Chromosome maps of man and mouse, III

Chromosome maps of man and mouse, III

GENOMICS 1, 3-18 (1987) Chromosome Maps of Man and Mouse, A. G. SEARLE,* J. PETERS,* M. F. LYON,* E. P. hANS,t *Medical 1. H. EDWARDS,* III AN...

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GENOMICS

1,

3-18

(1987)

Chromosome

Maps of Man and Mouse,

A. G. SEARLE,* J. PETERS,* M. F. LYON,* E. P. hANS,t *Medical

1. H. EDWARDS,*

III AND V.

J. BUCKLE+

Research Council, Radiobiology Unit, Chilton, Didcot, Oxon OX1 1 ORD, United Kingdom; and tsir William Dunn School of Pathology and *Genetics Laboratory, Biochemistry Department, University of Oxford, Oxford, United Kingdom Received

March

30, 1987

some high-resolution banding and that of Nesbitt and Franckg (1973) for mouse chromosome banding. In Table 1, a few mouse loci require comment. Several loci now have alternate or duplicate names, resulting from the discovery of the protein defect underlying the disease by which the locus was previously named. These include: (i) spherocytosis, sph, now known to be due to a deficiency of cw-spectrin and hence having the alternative symbol Spnu-1; (ii) shiverer, shi, due to a deficiency of myelin basic protein, and with the alternate symbol Mbp; and (iii) the Xlinked loci sparse fur, spf, and jimpy, jp, with the alternative symbols Ott and Pip, respectively. The Xlinked locus mdx has been entered twice, since it may be homologous with either that for Duchenne or that for Emery-Dreifuss muscular dystrophy in man. References given in Table 1 of the preceding paper in this series (Buckle et al., 1984) have been omitted. In the human chromosome maps (Fig. 1) the positions of loci are mostly based on individual assignments without reference to data on gene order. The sequence in which genes are listed is based on other evidence when available, but sources are not given. In general, this sequence conforms to that given in the Human Gene Map (McKusick, 1986b). In the mouse banded chromosome maps (Fig. 2), the breakpoint positions of extant reciprocal translocations and insertions are shown on the left. The estimated positions of those loci listed in Table 1 which can be located regionally are shown on the right, while symbols for those loci which have only been localized to a specific chromosome are shown on the extreme right. The same sources of information have been used as in the previous paper (Buckle et al., 1984), with the addition of the most recent linkage map of the mouse (Davisson and Roderick, 1986) and the latest listing of chromosome anomalies (Searle, 1986). A grid of the distribution of homologous loci among human and mouse autosomes (Fig. 3) shows evidence for 40 autosomal conserved segments, represented by groups of two or more loci, compared with 27 in our last paper. Every mouse autosome now has at least

Data on loci whose positions are known in both man and mouse are presented in the form of chromosomal displays, a table, and autosomal and X-chromosomal grids. At least 40 conserved autosomal segments with two or more loci, as well as 17 homologous X-linked loci, are now known in the two species, in which mitochondrial DNA is also highly conserved. Apart from the Y, the only chromosome now lacking a conserved group is human 13. Human 17 has a single conserved group which includes both short and long arms, and so may have remained largely intact in mammalian evolution. Human and mouse chromosomal maps show the approximate locations of homologous genes while the mouse map also shows the positions of translocaQ 1987 Academic Press, Inc. tions used in gene location.

Assignment of autosomal and X-linked loci to chromosomes in man and mouse continues to proceed rapidly. In the present paper, 184 autosomal and 19 sex-linked loci with regional assignments in both species are documented, compared with 102 autosomal and 12 X-linked loci by Buckle et al. (1984) and 47 autosomal with 9 X-linked loci by Dalton et al. (1981). As previously, we have taken the mouse nomenclature as standard for the reasons given by Lyon (1987), but we have included the human symbol as given by McAlpine et al. (1985) in Table 1, where it differs from the mouse equivalent in more than just capitalization. Oncogene loci are no longer distinguished by the prefix c- but retain periods as prefixes to their names. We have deviated from the standard mouse nomenclature (Lyon, 1985) by the use of-m rather than -2 to define mitochondrial proteins coded by nuclear DNA. In other respects, mouse gene nomenclature agrees with that given in the latest gene listing in the Mouse News Letter (Peters, 1987). This occasionally differs from that originally given by the authors, with changes mainly designed to bring human and mouse gene symbolism closer together. We have continued to use the nomenclature of the ISCN (1981) for human chromo3

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SEARLE

ET

AL.

TABLE Positions

of Homologous

1

Loci on Human

and Mouse

Chromosomes Location

Chromosome human;mouse

w w w

Locus symbol human;mouse

Name

of protein,

phenotype,

1;l 1;l

PEPC;Pep-3 SPTA;Spna-1 APCS;Sap APOA2;Alp-2 Ren

Peptidase a-Spectrin (12,83) Serum amyloid, P component Apolipoprotein A-2 (101,108) Renin (26)

lp;3 lp;3 lp;3 lp;3 lp;3

Amy-l Amy-2 Ngn3 Tshb Nras

a-Amylase (salivary) (41) cY-Amylase (pancreatic) (41) Nerve growth factor fi (205) Thyroid-stimulating hormone, .Neuroblastoma-transforming

1;3

ACTA;Acts

or-Actin,

lp;4 lp;4 lpi4 lp;4 lp;4 lp;4 lp;4 14 1;4

Eno-1 GDH;Gpd-1 Pd Pnd Ak-2 FUCAl;Fuca PGMl;Pgm-2 XPAC;Xpa ALPL;Akp-2

Enolase Glucose dehydrogenase Phosphogluconate dehydrogenase Pronatriodilatin (201) Adenylate kinase a-L-Fucosidase Phosphoglucomutase DNA repair in xeroderma pigmentosum, Alkaline phosphatase (196)

a;1 2q;l

Idh-1 cryg-1

Isocitrate Crystallin,

2~;6 2~;6

LEU2;Ly-2 I&

T-lymphocyte K light chain

2p;ll

Rel

.Reticuloendotheliosis

oncogene

2p;12 2p;12

Acp-1 Pomc-1

Acid phosphatase Proopiomelanocortin

a (44, 203)

3~;6

Raf-1

.Murine

3p;9 3p;9 a;9

Acy-1 GLBl;Bgl TF;Trf

3q;16

skeletal

muscle

Human

(55, 130)

@ polypeptide (141) oncogene (69,121,164)

(34)

dehydrogenase y polypeptide

2 (16,137,

(u-rat-I)

Mouse

q25 or q42 q22-q25 ql2-q23 p21-qter p21-qter

D HB-ter H3-ter H3-ter Cl-H3

P21 P21 p21-p22.1 P22 p22 and/or

D-H1 D-H1

pll-p12

pal-qter

group

A (105)

p36.13-pter p36.13-pter p36.13-~36.2 ~36 P34 P34 p22.1 q

E2 E2

c7 D3

(sol) (138) 1 (175)

alloantigen

leukemia

etc.

q33.3 q33-q35

B-Cl Cl-H3

P12

Cen-C2 Cen-C2

180)

(15)

ten-p13 p23 or p25 ~23

oncogene

(13,99,

162)

p24-p25

C2-G1

Aminoacylase fl-Galactosidase Transferrin (30, 126, 200)

P21 ten-p21 q21-q26.1

E3-ter EB-ter E3-ter

SST,Smst

Somatostatin

@8

a3

Adh-1

Alcohol

dehydrogenase

4q;3

Adh-3

Alcohol

dehydrogenase

Ed

Epidermal

a5 4q;5 $5 $5

AfP ALB;Alb-1 PGM2;Pgm-1 PEPS;Pep-7

a-Fetoprotein Albumin Phosphoglucomutase Peptidase

5q;ll

GMCSF;Csfgm

Colony-stimulating

5q;13 5q;13 5;13

Dhfr HEXB,Hex-2 ARSB;As-1

Dihydrofolate Hexosaminidase Aryl sulfatase

5q;18 5;18

GRL;Grl-1 DHLAG,Ii

Glucocorticoid receptor (58,64, 194) HLA-Dand Ia-associated invariant chain

6q;4

CGA;Tsha

Chorionic gonadotrophin stimulating hormone,

w

growth

Malic

enzyme

2 (mt)

%;9

MEl;Mod-1

Malic

enzyme

(sol)

sol, soluble.

(41, 75)

q21-q25

D-H1

(class

I) y polypeptide

(41, 75, 77)

q21-q25

D-H1

factor

(131, 205)

q25-q27 qll-q13 qll-q13 p14-q12 pll-q12

factor

ME2;Mod-m

mt, mitochondrial;

I) (Y polypeptide

(59, 68, 84)

reductase (61) B (Sandhoff B (49,102a)

6;7

Note.

(class

E2-G2 E2-G2 B-D B-E2

q21-q23 qll.l-q13.2

disease)

a chain;

(97) pll-q13

thyrotropin-

Dl-ter

qll-q13 (28,160) q12-q21

a (98)

El-F1 ql2

EB-ter

CHROMOSOME

MAPS

TABLE

OF MAN

AND MOUSE,

5

III

l-Continued Location

Chromosome human;mouse

Locus symbol human;mouse

Name of protein, phenotype, etc.

Human

60

Pgm-3

Phosphoglucomutase

w

6q;lO

M yb

.Avian myeloblastosis oncogene

q15-q24

6p;17 6p;17 6p;17 6p;17 6p;17 6p;17 6p;17 6p;17 6q;17 617 617

HLA;H-2 Bf c2 c4 CA21H;Oh21 Glo-1 Tnfa Tnib Sod-m Tcp-1 Pim-1

Major histocompatibility complex (102) Complement factor B Complement component 2 Complement component 4 Congenital adrenal hyperplasia (al-hydroxylase) Glyoxalase 1 Tumor necrosis factor (Y(142, 143,178) Tumor necrosis factor fl (142, 143,178) Superoxide dismutase (mt) T-complex protein 1 (72, 174,197) .ProviraI integration, MCF (33,74,135)

~21.3 ~21.3 ~21.3 ~21.3 ~21.3 p21.1-~21.31 p21.1-~21.3 p21.1-~21.3 cl21

7~;2

Blvr

Biliverdin

7;5 7;5 7q;5 7;5

PSP;Psph As1 GUSB,Gus MDHB;Mor-m

7~;6 7~;6 W 7q;6 7q;6

(195)

Mows E3-ter

B-C B-C B-C B-C B-C B B-C B-C

pter-ql2

A3-B B-C

ten-pl4

E4-ter

Phosphoserine phosphatase Argininosuccinate lyase &Glucuronidase Malate dehydrogenase (mt)

pter-q22 p21-q22 cenq22 p13-q22

E2-ter E2-G2

GCTG,Ggc Hox-1 Tcrb %a Try-l

y-Glutamyl cyclotransferase (11,189) Homoeobox 1 (17,123,155) T-cell receptor, /3 polypeptide (21, 104) Carboxypeptidase A (86) Trypsin 1 (192)

pl4-pter p14-p21 q32 or q35 q22-qter q22-qter

CenC2 B3-C B

7p;ll

Erbb

.Avian erythroblastosis

p12-p14

Cen-Bl

7p;13

Tcrg

T-cell receptor y polypeptide (100)

COLlA2;Cola-2

Collagen, type I, (~2 chain (20,90, 182)

P15 q21.3-q22.1

A2-A3

7q;16 8;3 8;3

CAl;Car-1 CA2;Car-2

Carbonic anhydrase 1 (19) Carbonic anhydrase 2

8q;4

Mos

.Moloney sarcoma oncogene

qll-q22

8p;8

reductase

oncogene (173,179,204)

Cen-D Cen-D

GSR;Gr-1

Glutathione

p21.1

Cen-A4

8q;15 8q;l5

MYC TG;Tgn

.Myelocytomatosis oncogene (1) Thyroglobuiin (184)

reductase

q24 @4

D2-D3 BI-ter

gq;2 %;2 9@ 9q;2

Ak-1 AbI Fpgs Ass

Adenylate kinase .Abelson leukemia oncogene Folylpolyglutamate synthetase (56,88,89) Argininosuccinate synthetase (136)

44 434 cenq34 q34-qter

Cen-Cl

9p;4 9p;4 9p;4 9p;4 90 9;4

Galt Ace-1 IFNA,Ifa IFNB,Ifb Orm-1 ALAD;Lv

Galactose-l-phosphate uridyl transferase Aconitase Interferon, CY(leukocyte) (25,38,94,107,187) Interferon, B (fibroblast) (71,95,191) Orosomucoid &Aminolevulinate dehydratase (46)

P13 p13-p22 pl3-pter P21 q

CenC2 Cen-C2 C3-C6 C3-C6 c2-Cl B2

9q;19

ALDHl;Ahd-2

Aldehyde dehydrogenase (cytoplasmic) (82,186)

9

B

lOq;7

Oat

Omithine

q23-qter

1Oq;lO lo;10

PP;Pyp Hk-1

lOq;14 lOq;19 16q;19 lOq;19 lo;19 llp;2

Adk Tdt Got-l PGAMA;Pgam-1 LIPA,Lip-1 Acp-2

Pyrophosphatase (inorganic) Hexokinase Adenosine kinase Terminal deoxynucleotidyltransferase (202a) Glutamic oxaloacetic transaminase (sol) Phosphoglycerate mutase A (62,66,91) Acid lipase Acid phosphatase

aminotransferase

(146, 156)

Cen-Cl

qll.l-q24 cenq24 q23-q24 q25.3 q25.3 ten-pl2

B4 A2-B Dl

6

SEARLE TABLE

ET AL.

l-Continued Location

Chromosome human;mouse

Locus symbol human;mouse

Human

Name of protein, phenotype, etc.

Mouse

llp;2 llp;2

CAT;Cas-1 Fshb

Catalase Follicle-stimulating

llp;7 llp;7 llp;7 llp;7 llp;7 llp;7 llq;7

Th Hras-1 Hbb INS;Ins-2 CALCl;Calc LDHA;Ldh-1 Int-2

Tyrosine hydroxylase (31) .Harvey rat sarcoma oncogene Hemoglobin beta chain Insulin Cakitonin (140) Lactate dehydrogenase .Mammary tumor integration site 2 (23, 148)

P15 p15.5 p15.5 p15.5 p15.1-p15.4 p12-p14 ql3

llq;9 llq;9 llq;9 llq;9 llq;9 llq;9 llq;9 llq;9

APOAl;Alp-1 ESA4;Es-17 UPS GST3;Gsta Thy-l Ncam Em-1 T3d

Apolipoprotein Al (2) Esterase A4 Uroporphyrinogen I synthase Glutathione S-transferase, isozyme 3 (36, 181) Thy-l cell surface antigen (159) Cell adhesion molecule, neural (45, 145) .E26 avian leukemia oncogene (183,193) TiT3 complex, 6 polypeptide (190)

ql3-qter ten-qter q23.2-qter ql3-qter q22.3 @3 q23-q24 q23-qter

12;4

ALDH2;Ahd-m

Aldehyde dehydrogenase (mt) (76,82)

12p;6 12p;6 12p;6 12p;6

Kras-2 LDHB;Ldh-2 Gapd Tpi-1

.Kirsten rat sarcoma oncogene (22,62) Lactate dehydrogenase Glyceraldehyde-phosphate dehydrogenase Triosephosphate isomerase (151)

p12.1 p12.1-p12.2 P13 P13

F3-G3 C2-G1

12p;8

Proline-rich

~13.2

Cen-B

12q;lO 12q;lO 12;lO

Prp 1FNc;Ifg PEPB,Pep-2 cs

Interferon y (187) Peptidase (199) Citrate synthase

q24.1 q21 pll-qter

Dl-D3

12q;15 12;15 12;15

Hox-3 Ela-1 Int-1

qll-q15

F

pter-ql4

F

12;15 12;15

GPDl;Gdc-1 PFKB;Pfk-4

Homoeobox 3 (155) Elastase 1 (78, 79) .Murine mammary tumor oncogene (integration sitt ?) (1, 148) Glycerol-3-phosphate dehydrogenase (96) Phosphofructokinase, brain and testis type (4)

13q;14

ESD,Es-10

E&erase (165)

q14.1

D2-E2

14q;12 14q;12 14q;12

PI;Pre-1 I& Fos

a,-Antitrypsin (153) Immunoglobuhn heavy chains .Murine FBJ osteosarcoma oncogene (6,43)

q32.1 q32.3 q21-q31

Cen-Fl Cen-Fl Cen-Fl

14q;14 14;14

Np-1 Tcra

Purine nucleoside phosphorylase (165) T-cell receptor, (Ypolypeptide (7, 101)

q13.1 pter-q21

B-Cl C-D

15q;2 15;2

B2m SORD;Sdh-1

&-Microglobulin Sorbitol dehydrogenase

@2 pter-q21

E4-Hl E4

15q;7 15q;7 15q;9 15q;9 15q;9 15q;17 16q;8 16q;S 16q;8 16q;8 16q;8 16q;8 168 16p;ll

Idh-m Fes

Isocitrate dehydrogenase (mt) .Feline sarcoma oncogene

q21-qter q25-q26

B3-El Cen-A3

Mpi-1 PKM2;Pk-3 CYP2;P450-1 Actc

Mannosephosphate isomerase Pyruvate kinase Cytochrome P-450, dioxin-inducible cu-Actin, cardiac muscle (35, 70)

q22-qter q22-qter

B-E4 B-E4 A4

Aprt Got-m Mt-1 Mt-2 HP Tat Ctrb Hba

Adenine phosphoribosyltransferase Glutamic oxaloacetic transaminase (mt) Metallothionein 1 (29,92) Metallothionein 2 (29,92) Haptoglobin (9,51) Tyrosine aminotransferase (8, 139) Chymotrypsinogen B (192)

q22 q12-q22 @2 @2 q22.1 q22-q24

Hemoglobin (Ychain (145a)

p13.1

hormone, fl polypeptide (67)

protein (5, 117)

P13 pl3-pter

E4-Hl

Fl-ter B3 Cen-A4 Cen-A4 Cen-A4 Cen-A4 A4-E4

D3

C2-Gl

C-ter

1 (73, 188) qll-qter

A4-El A4-El El-ter A4-El Cen-Bl

CHROMOSOME

MAPS

TABLE

OF MAN AND MOUSE,

7

III

l-Continued Location

Chromosome human;mouse

Locus symbol human;mouse

Name of protein, phenotype, etc.

Human

Mouse

17p;ll 17p;ll 17q;ll 17q;ll 17q;ll 17q;ll 17q;ll 17q;ll

Myh-1 TP53;Trp53 GALK;Glk Tk-1 COLlA-l:Cola-1 ERBAl;Erba Hox-2 Umph-2

Myosin heavy polypeptide, skeletal muscle Transformation-associated p53 (122,163) Galactokinase Thymidine kinase (166) Collagen, type 1, (Y1 (51, 132, 133a) .Avian erythroblastosis oncogene Homoeobox 2 (133,154) Uridine monophosphatase 2 (198)

pll-pter P13 q21-q22 q21-q22 q21.31-q22 qll-q21 q q

18q;18 18;18

PEPA,Pep-1 MBP;shi

Peptidase Myelin basic protein; shiverer (161,167,172)

q23

19p;7 19q;7

PEPQPep-4 CYPl;Coh

Peptidase Cytochrome P-450, phenobarbital-inducible hydroxylase (40)

19q;7 19q;7 197

Gpi-1 ‘kfb Lhb

Glucosephosphate isomerase (85, 108) Transforming growth factor fi (60) Luteinizing hormone 6 subunit

19p;17 19;17

c3 Pgk-2

Complement component 3 (147) Phosphoglycerate kinase 2 (47,63)

2op;2 2op;2 2oq;2 2oq;2

PRNP;Prn-p ITPA,Itp Ada Src

Prion protein (177) Inosine triphosphatase (129) Adenosine deaminase (152,171) .Rous sarcoma oncogene (103)

pl2-pter P q13.2-qter q12-q13

21;16 21q;16 21q;16 21q;16

Ets-2 Prgs Sod-l 1FNR;Ifrc

.E26 avian leukemia oncogene (193) Phosphoribosylglycinamide synthetase Superoxide dismutase (sol) Interferon receptor

q22.1 q22.1 q21-qter

21;17

Crya-l

Crystallin, a A (176)

B-C

22;ll

TC2;Tcn-2

Transcobalamin

Cen-B

22q;15 22q;15 22q;15

Sis ARSA,As-2 Dia-1

.Simian sarcoma oncogene (1) Arylsulfatase Diaphorase (NADH)

q12.3-q13.1 q13.31-qter q13.31-qter

E

1; coumarin

El-E2 B5-D D D

D-ter

ten-p13.2 q13.1-q13.3

Cen-A3 Cen-A3

ten-q13.2 q13.1-q13.3

Cen-A3

D-ter B-C

II (3)

D-ter Cl-ter H3-ter

BS-ter

22q;16

1GLC;Igl

Immunoglobulin

qll

Cen-B5

Xp;X&Y

sts

Steroid sulfatase (32, 50,53,65,93)

p22.32-pter

F4-ter

Xp;X Xp;X Xp;X

CDPX,Bpa HPDR,Hyp DMD,mdx 0TC;spf syn-1 Pgk-1 Xce EDA;Ta GLA,Ags XLA,xid

p22.3-pter P22 P21 p21.1 p11.2 cl13 q13 or q21.1 @l q21-q22 q21.3-q22

A6-D F2-ter A6-D A2 A2-A3 D-F1 D D Fl Fl

X,X x;X x;X

PLP;jp Hprt F9;Cf-9 GGpd EMD;mdx MNK,Mo DHTR;Tfm PYK;Phk

Chondrodysplasia punctata; bare patches (32) Hypophosphatemia (114,158) X-linked muscular dystrophy (homology doubtful) Ornithine carbamoyltransferase; sparse fur (106,112) Synapsin 1 (202) Phosphoglycerate kinase X-inactivation center (24, 54, 157, 185) Ectodermal dysplasia, anhidrotic; tabby (113, 124) a-Galactosidase (57,128) Agammaglobulinemia; X-linked immune deficiency (9a, 126a) Proteolipid protein; jimpy (39, 119) Hypoxanthine phosphoribosyltransferase (111) Coagulation factor IX (4a, 18a) Glucose-B-phosphate dehydrogenase (118,150) X-linked muscular dystrophy (homology doubtful) Menkes’ disease; mottled (81) Testicular feminization Phosphorylase kinase

@2 q26-q27.3 q27.1 @8 @fJ pll-qll pll-q13

Fl A6 A6-A7 A6-A7 A6-D D-F1 A6-D A6-D

YPiY

TDF;Tdy

Testis-determining

pll.2-pter

A-B

XPS XPS X%X X%X =xX X%X X%X X%X m;x xq;x X6 X%X

X chain

D

factor (48, 115, 116)

8

SEARLE

- (1,111 ;I;;; >N - (1,111 3; z ‘n& - -E 2-

ET

AL.

1 I&“

Pnd

)Ishb,Nras

- R‘f

I= -1

1 I fw

=

-hd 1

1

= -

El

J-

UnY, “IY r

Rfp,RLs

!

Adkl,ndh-3

,,,,I/ 3:u11,111

- f -

J

]Esf

nUb

El

uDM2 i

-J- cou2

Z-Mb =Iwb

Ink-i,nbl,nss

Hsa7 FIG.

1.

The human

karyotype,

to show positions

of genes also located

in the mouse.

1I .,111 II !

CHROMOSOME

I

MAPS

OF MAN AND MOUSE,

9

III

Idt T3d

Hsa 11

1: 1

= 2-

I

,LDHB

M-1



I

Hox-3 )PEPB

SliNC

,HJ

-l-

Hsa 12

= 1=

SORD

Hsa 16

Hsa 15

I= i-I-

/ J-HPIat3-G0t-s l-

&,I In3 1

1

z:::1 #ifi Hex-21-EBB41 I- colsnl UMPh-2 -R,,,,,1 J 1 -U = 2-

Hsa17

?

EP

Hsa X FIG. l-Continued.

I- CDPX

7llPDR

SEARLE

10

ET

AL.

-171 -Ml -T27H

!

-1lUa

Rrn Crysl

- IllAd

-T13H,T14RI -T7Ca -T24ll -II1H,TlCso

-T3Bi,T26H,TSCa -TISn,T2Ua -128H

h-1

FUN was

Eno-1

-Tsha Its ilk-2

_

- ‘,,>!;, !4 Ld Mm3

R

I II

I GYC

- 131H,Md,ISlld B

&

Tcrb 1

-1264Ca,19Rl

FIG.

2.

R=

The mouse

karyotype,

to show positions

of genes also located

in man,

as well

as positions

I

Hox4 Cpa - t$

of translocation

breakpoints.

CHROMOSOME

MAPS

OF MAN AND MOUSE,

11

III

Idk-n llod-2 Hbb J

1 z-P4W1

Mm9

.Icn-2 -13BH

Rep-1 Pm-1 r

-142N,19nd D= -?38N E _ -Ud

R

Nox-2

Ik-1

l&i’

I

7 Clk

._ . Mmu 12

Mmu 11

-ti99N

-t264H,I3nd B -1716 c = -17#I,IlHa ;h-1 ISnd,tCnd a l-

c= -

it;

D -

= /Ml

-1lGSO E= 1 -16Q

!

d

Mmu 14

Mmu13 FIG.

2-Continued.

Np-1

12

SEARLE

ET

AL.

-16k -19H -T4nd :r lye

,Glc-1

7s

Sis M-1 1 Hox-3

I :

Mmu 15

1

-17Rl,r3Rl,t37H

i

bra-1 a

I

Sod-n Rctc

Syn-1

-116H -t5Rl 16R1‘s1ct rlR1:l3Ikl -TM FIG. 2-Continued.

TW I-

I

p1 M-1

CHROMOSOME MOUSE I I

.”. . . .., ...

II

MAPS

IIllllll

MAN ;

I

i 12

i

iiiiiiiiiil 3

4

5

6

7

8

9

10 1: 12 13 141516171319

FIG. 3. Grid showing assignments of homologous autosomal loci in man and mouse. The sides of the rectangles are proportional to chromosomal length. Loci assigned to short or long arms in man are represented by triangles, the apex pointing to the centromere. Other loci are represented by circles. The larger triangle refers to all the loci in the MHC complex.

one conserved group; the only human exception is chromosome 13. The known genetic length of the conserved groups is usually of the order of a few centimorgans. As a corollary of this, some chromosomes carry a number of conserved segments. Human chromosome 7 is now known to have homologies on at least six mouse chromosomes; likewise, mouse chromosome 11 has homologies on at least six human chromosomes (Fig. 3). However, a few conserved segments appear to be larger. Examples include the groups on l;l, 9;4, and 1711 (human chromosomes give first) which each appear to extend over 20-25 CM on the mouse chromosome. In general, the data still support the finding of Nadeau and Taylor (1984) that the average length of conserved segments is approximately 8 CM. More detailed study of the larger conserved groups suggests that in some instances the genetic changes that have occurred during evolution have been complex. Evidence for this includes, in some cases, apparently different arrangements of loci within a conserved group in the two species or intercalation of one or more loci from other chromosome(s) within a conserved group. The groups that provide information of this kind are those that consist of more than two loci and in which the relative order of more than two loci is known in both species. There appear to be about 10 such groups. In two, 12p;6 and 19;7, the order of loci appears to be the same in the two species, but in 19;7

OF MAN AND MOUSE,

III

13

one gene Fes from another human chromosome (15q) is intercalated. Similarly, in the groups 1;4,6;17, and 9;4, genes on other human chromosomes are intercalated into the mouse group. Nadeau et al. (1986) have suggested that, for the 9;4 homologies, two separate segments have been conserved since divergence of the human and mouse lineages, but there has been a rearrangement of gene order. In the group 14q;12 the order of loci appears to be different in the two species. The groups 3;9 and 7;6 each apparently consist of two separate groups of loci on the human chromosome, although they appear as a single group on the mouse chromosome. There are a variety of possible explanations for these complexities in the conserved segments. The first is that of error, either in determination of order of loci in one or both species or in the ascription of homology. In the mouse the order of loci is taken from the map of Davisson and Roderick (1986), but the authors of this map point out that in some instances the order of loci is relatively uncertain. An example of uncertainty concerning ascription of homology concerns the insulin loci, where there is some doubt as to which mouse locus corresponds to which human locus. However, an equally possible explanation is that the differing orders of loci, and intercalated loci, are indeed correct findings and that they indicate a sequence of chromosomal changes in evolution. Such sequences of changes would include a combination of translocations with inversions to explain differing orders of loci. There could also have been insertions, either of individual loci or of small segments, preceding or following translocations. In several cases, e.g., 17;11, genes apparently belonging to a single conserved group are dispersed between the short and long arms of a human chromosome. This suggests the inclusion of pericentric inversions among the chromosomal changes. Figure 4 shows orders of X-linked loci in the two species. Buckle et al. (1985) suggested that the differing arrangements in man and mouse imply the occurrence of relatively few rearrangements during the evolution of the X. Only two rearrangements were required to explain the known locations up to that time. There have since been various further localizations of X-linked genes, including those for hypophosphatemia and anhydrotic ectodermal dysplasia in man and Factor 9 in mouse. In general, the original suggestion of two rearrangements still holds good. However, there does appear to be an exception, namely, the locus of synapsin. In man, this is located in Xp, proximal to the locus of ornithine carbamoyltransferase, whereas in the mouse, synapsin is located distal to Ott. This discrepancy apparently requires that another rearrangement be postulated. The re-

SEARLE

HP~ 1 FQ/Cf-9 GW EMDImdx MOUSE

X XLAlxid GLAIAQS

PLPljp

FIG.

4.

chromosomal locus symbols well known.

Relationship between approximate positions loci defined in both man and mouse. Lines to X have been omitted where locus positions

attechmmt

tRNALw

of Xjoining are less

Approximnte site of to inner membrane1

I 11

ET

AL.

sults of further detailed mapping of the mouse and human X-chromosomes will be awaited with interest. Whereas many homologous loci are known in man and mouse, and over 200 have regional assignments, very few homologous alleles are known. This is not unexpected, for the detailed knowledge of gene and protein structure required to establish such homologies is limited to relatively few proteins. Two examples are known, both at loci coding for globin polypeptides. A mouse homolog, Hbbd4, of human hemoglobin Rainier has been found, in which the substitution /3145 Tyr + Cys occurs (Peters et al., 1985). A second example concerns a-globin, for the mutant haplotype HbcP in the mouse is homologous with hemoglobin Jackson ((~127 Lys + Asn) in man (Peters, 1986). This comparison of human and mouse genomes would be incomplete without considering that of the mitochondrion (Fig. 5), which is highly conserved (Fischer Lindahl, 1985; McKusick, 198613). Both mitochondrial genomes are circular, consisting of 16,569 base pairs in man and 16,295 base pairs in the C3H mouse (Bibb et al., 1981). Both contain loci for 12- and

tRNATh’

NADH

1

w

‘4-l dehyd wbmt

nase “$

$j tR/Ah(CUN) tRNA’” tRNAm’

.

-

,

tRNA*(AGY) ‘tRNAnia

NADH

Direction L-ShlU tRNAT’F’+

’ _ it&it

cytodllo~ c OXIdwe II (ATt%o

FIG. 5.

Gene map of the human

mitochondrial

81

chromosome.

[Courtesy

of Victor

A. McKusick]

4L

CHROMOSOME

MAPS

OF

16-S ribosomal RNA and the same 22 transfer RNAs. One cytochrome b and three cytochrome c oxidase loci are found, as well as two ATPase subunits. These are all located at similar positions along the human and mouse H and L strands. In addition, loci for seven NADH dehydrogenase subunits have been identified in the human mitochondrial genome (Chomyn et al., 1985), while the mouse genome has seven unidentified reading frames (URF) in similar positions. It seems highly likely that they code for the same coenzymes. However, Fischer Lindahl(198.5) and colleagues have described a maternally inherited gene Mtf in the mouse which is probably mitochondrial and which is unknown in man. Mtf combines with the Hmt gene of the mouse major histocompatibility complex to form a maternally transmitted cell-surface antigen called Mta. There is evidence for a number of maternally transmitted diseases in man, although no disease clearly related to a mitochondrial lesion has yet been defined, despite the relatively high mutability of the mitochondrion (Brown et aZ., 1979; Merril and Harrington, 1985). It seems likely, however, that some disorders of mitochondrial function will be defined in both man and mouse in the near future. Finally, it may be useful to consider man-mouse genetic conservation and divergence in evolutionary terms. It seems reasonable to assume, like Nadeau and Taylor (1984), that the common ancestor of the two species lived about 70 million years ago. If we assume four generations per year in the lineage to mouse and one per year on average in the lineage to man, then their distance apart in terms of generations is roughly 350 million. Yet present evidence suggests that at least five homologous segments 20 CM or more in length have remained intact. Nadeau and Taylor consider that conserved segments “are probably relics of ancient linkage groups not yet disrupted by chromosomal rearrangements.” For some of these segments, however, their persistence intact may well be connected with factors other than chance. In this connection, evidence from other species should prove useful.

MAN

AND

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