On the effect of adenosine 3′,5′ cyclophosphate on the kinase of UDPG: α-1,4-glucan α-4 glucosyl transferase

On the effect of adenosine 3′,5′ cyclophosphate on the kinase of UDPG: α-1,4-glucan α-4 glucosyl transferase

Vol. 23, No. 3, 1966 BIOCHEMICAL AND BIOPHYSICAL ON THE EFFECT OF ADENOS;INE 3',5' OF UDPG:W1,4-GLUCAN Fr. and J. Department of Biochemistry, U...

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Vol.

23, No. 3, 1966

BIOCHEMICAL

AND

BIOPHYSICAL

ON THE EFFECT OF ADENOS;INE 3',5' OF UDPG:W1,4-GLUCAN Fr.

and J.

Department of Biochemistry, University of Minnesota,

Received

March28,

Adenosine converts

form

for

(D) (Friedman 1964).

This

the cyclophosphate The present

information

3',5' 0.25

(1965).

cyclophosphate or 0.4

reaction

*This work Institute Service.

kinase

independent into

1963;

stimulate

(I)

form

nor

the mechanism assesses

the kinase

neither

6-phosphate

and Lamer, from

dependent

1964; Appleman

phosphorylase

the sensitivity

of action

which

of UDPG:Ol-1,4-glucan

the glucose

can be distinguished However,

paper

to

Rosell-Perez

1965).

I kinase

b kinase

of the kinase

of the cyclophosphate

the sensitivity

was tested

To 0.1 ml of

a

range

in principle

solution

(concentrations

ml of a solution

2.5 or 5 mM caffeine, kinase

known

and offers

are

some

on the mechanism.

The transferase and Larner

is

(EC 2.4.1.11)

and Larner,

and Iarner,

known.

6-phosphate

transferase

(Friedman

Iarner

College of Medical Sciences Minneapolis, Minnesota

cyclophosphate

the glucose

-et al.,

TRANSFERASE"

1966

3',5'

a-4-glucosyl

COMMUNICATIONS

CYCLOPHOSPHATE ON THE KINASE

a-4-GLUCOSYL **

Huijing

RESEARCH

containing

was stopped

was supported of Arthritis

by adding

containing

as indicated enzyme,

and 50 mM mercaptoethanol.

as described ATP, MgCl

in Figures

and adenosine 2 1 and 2) was added

8 mM glycerophosphate After

by Friedman

7 min at 30'

0.1 ml EDTA, 100 mM, and 0.05

pH 7.8, C, the ml aliquots

in part by a grant (No. AM 09071) from the National and Metabolic Diseases of the Il. S. Public Health

**On leave of absence from the Department of Biochemistry of the University recipient of a fellowship of the Netherlands of Amsterdam, The Netherlands, Organization for the Advancement of Pure Research (Z.W.0.)

259

Vol. 23, No. 3, 1966

were

then

glucose

BIOCHEMICAL

transferred

to tubes

6-phosphate)

Villar-Palasi

for

vity

or where

procedures

ferase

activity

was determined

transferase

I kinase

into

comparable

activity

did

from

UDPG into

before

the reaction

change

was determined. in acti-

incubation,

i.e.,

to controls

where

was started.

In some tubes,

in the presence

by

as a decrease

kinase

compared

(without

15 min at 30' C

glycogen

glycogen

not

for

is expressed

rates.

mixture

as described

incubated

the 7 minute

EDTA was added

gave

I activity

were

I kinase

I during

in cpm incorporated

was added,

total

The tubes

transferase

of the transferase

decrease

trol

of the

0.1 ml of the test

of transferase

of C14 glucose

and the incorporation The activity

containing

assay

-et a1.,(1966).

AND BIOPHYSICAL RESEARCH COMMUNICATIONS

the

of glucose

appreciably

total

the

no ATP Both

(I+D)

6-phosphate.

during

as a

con

transThe

transferase

test.

[ATP] IOmM [Mg2’] 5mM

E

304k3005 01 I

2

3

bdenosine Fig.

1 Transferase I kinase 3',5' cyclophosphate.

L 4

5

6

3’, 5’ cyclophosphote] activity

at varying

7

8

9

IO

x 10e7M concentrations

of adenosine

0.4 ml of 51,000 x g supernatant containing 2.5 mM caffeine was added to 0.1 ml of a solution containing ATP and MgC12, final concentrations 10 mM and 5 mM and cyclophosphate as indicated. The transferase I kinase reaction was allowed to proceed for 7 min, the transferase I activity was assayed for 15 min.

260

Vol.

23,

No.

As nized then

3, 1966

BIOCHEMICAL

source

a

of both

in 3 volumes for

for

3 hours

x g and the precipitate

50 mM mercaptoethanol.

Fig.

mately

3',5' 6 x 10

stimulation terms

by the cyclic

is

achieved

and a total

sensitivity that

in the

tration

of ader,osine

Robison

et al.,

ferase

which

is

1965,

Huijing,

cogen

concentration

sion

of transferase

3',5'

for

I form,

of the heart

(Posner

al. -et -J

varying

Mg

I (Huijing,

Butcher

2 shows the activiry 2+

concentrations.

et -- al 2

is

causes

heart,

half

max-

of the cyclic is

found.

This

surprising

in view

increases

the concen-

et al.,

1965;

196.5; Robison

results

of

of the trans-

a decrease

decrease

I kinase

et al.,

in the glyin a conver-

under

system

of skeletal

muscle

these

conditions

of skeletal

muscle

is

and the

same

and liver

1965).

of the transferase Both

in

1966).

transferase

kinase

maximal

a 20% increase

on the fraction

and this

at approxi

the

of rat

and Mayer,

3', 5' cyclophosphate

of the phosphorylase 1964;

effect

by

nucleotide.

Lhich

epinephrine

However,

as that

conditions

(Hammermeister

(Williams

super-

caused obtained

concentration

I kinase

cyclophosphatti

of the

assay

epinephrine,

in the

adenosine

Figure

organ

has no direct

D into

is

of the same magnitude

1965),

1966).

activation

cyclic

an identical

transferase

intact

The sensitivity heart

heart

for

To the clear

activity

of 10% homogenate

stimulation

of the rat

the fact

with

x g.

from

pH 7.8

was incubated

represents

of added

x g supernatant

was obtained

I kinase

these

nucleotide

in the absence

a 12,000

activation

maximal

Under

was cen-

of 2.5 or 5 mM.

in transferase

M cyclophosphate.

supernatant that

45 min at 51,000

Half

was homoge-

of 8 mM glycerophosphate,

ml

to a concentration

cyclophosphate. -8

of the activity

nucleotide

for

the increase

produced

Using imal

was added

The resulting

The enzyme solution

C and centrifuged

1 shows

adenosine

in 5

muscle

5 mM EDTA; 100 mM KF and

at 78,000

containing

x g.

COMMUNICATIONS

rabbit

pH 7.8 containing

was homogenized

caffeine

kinase

12,000

muscle

natant,

RESEARCH

2.0 min at

10 g fresh

45 min at 30'

BIOPHYSICAL

and its

transferase

50 mM Tris-HCl,

centrifuged

trifuged

AND

curves

261

with

I kinase

and without

as a function adenosine

3',5'

of

Vol.

23, No.

3, 1966

BIOCHEMICAL

AND

BIOPHYSICAL

8

Pig.

2

Transferase

I kinase

IO

activity

RESEARCH

14

12

at varying

COMMUNICATIONS

16

I8

concentrations

20

of M&12.

0.25 ml of 51,000 x g supernatant containing 5 mM caffeine was added to 0.1 ml ATP (final concentration 8 mM) and adenosine 3',5' cyclophosphate where indicated. The transferase I kinase reaction was I activity was assayed allowed to proceed for 7 min, the transferase for 15 min. cyclophosphate

are

cyclophosphate

changes

ditions causes

At low Mg

sigmoidal. the rate

the cyclophosphate

the cyclophosphate

from zero

may exert

a 100% stimulation.

concentrations to a finite

a regulatory

high

At

under

2+

Mg

conditions

2+

adenosine

role.

Mg

2+

there

itself

these

At 4 mM M&12

concentrations

where

Under

value.

3',5' con-

it

is no effect

has maximally

of

stimulated

the kinase. On the basis it

appears

serves form tions

that

the dual

of kinetic these role

analysis

phenomena

of Mg2+.

affinity

Adenosine

of the Mg

2+

can be explained

of activating

of the Mg ATP complex.

for

to be dealt

the kinase,

The activation, 3',5'

in a future

by the

possibility

and being however,

cyclophosphate

the activating

with

site

may

act

that

a substrate

requires

publication

high

to increase

in the concentrathe

on the enzyme.

References Appleman, Comm .,

H.M., l4,

Belocopitow, 550 (1964).

E. and Torres,

262

H.H.,

Biochem.

Bi.ophys.

Mg

Res.

2i

Vol.

23, No.

3, 1966

BIOCHEMICAL

AND

BIOPHYSICAL

RESEARCH

COMMUNICATIONS

Butcher, R.W., Ho, R.J., Meng, H.C. and Sutherland, E.W., J, Biol. Chem., 240, 4515 (1965). Friedman, D.L. and Larner, J., Biochemistry, 3 669 (1963). Friedman, D.L. and Larner, J,., Biochemistry, & 2261 (1965). Hammermeister, K.E., Yunis, A.A. and Krebs, E.G., J. Biol. Chem., 240, 986 (1965). Huijing, F., Fed. Proc., G 449 (1966). Posner, J.B., Hammermeister, K., Bratvold, G.E. and Krebs, E.G., Biochemistry, 1, 1040 (1964). Robison, G.A., Butcher, R.W., @ye, I., Morgan, H.E. and Sutherland, E.W., Mol. Pharmacol., & 168 (1965). Rosell-Perez, M. and Larner, J., Biochemistry, 2, 75 (1964). Villar-Palasi, C., Rosell-Perez, M., Hizukuri, S., Huijing, F. and Larner, J. in Methods in Enzymology (Ed. S.P. Colowick and N.O. Kaplan) Vol. VIII (64) (1966). Williams, B.J. and Mayer, S.E:., Fed. Proc., 2& 151 (1965).

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