FB2025_01 , released February 20, 2025
Physical Interaction report
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General Information
Interaction Type
Interacting Genes
FlyBase ID
FBig0000094099
Interaction Network
Interactions Browser links
CycT network
Cdk9 network
esyN Network Diagram
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Protein
RNA
Selected Interactor(s)
Common Interactor(s)
Reported Interactions
FBrf0083583-1.CH.MW
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
CycT 

124

neutral component
CycT 

124

neutral component
CycT 

124

neutral component
Cdk9 

43

neutral component
Cdk9 

43

neutral component
Cdk9 

43

neutral component
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
Isoform-specific participants
Corresponds to
Description
Role
Note
Comments concerning this interaction

Source was embryonic nuclear extract of wild-type fly line; proteins produced from endogenous genes.

FBrf0083583-2.CH.MW
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
CycT 

P-TEFb 124 kDa

neutral component
CycT 

P-TEFb 124 kDa

neutral component
CycT 

P-TEFb 124 kDa

neutral component
Cdk9 

P-TEFb 43 kDa

neutral component
Cdk9 

P-TEFb 43 kDa

neutral component
Cdk9 

P-TEFb 43 kDa

neutral component
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
Isoform-specific participants
Corresponds to
Description
Role
Note
Comments concerning this interaction

Source was nuclear extract of Kc cell line; proteins produced from endogenous genes.

FBrf0090397-1.CH.MW
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
CycT 

P-TEFb 124 kDa

neutral component
CycT 

P-TEFb 124 kDa

neutral component
CycT 

P-TEFb 124 kDa

neutral component
Cdk9 

P-TEFb 43 kDa

neutral component
Cdk9 

P-TEFb 43 kDa

neutral component
Cdk9 

P-TEFb 43 kDa

neutral component
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
Isoform-specific participants
Corresponds to
Description
Role
Note
Comments concerning this interaction

Source was nuclear extract of Kc cell line; proteins produced from endogenous genes.

FBrf0098965-3.CH.MS
Reference
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
CycT 

P-TEFb 124 kD

neutral component
CycT 

P-TEFb 124 kD

neutral component
CycT 

P-TEFb 124 kD

neutral component
Cdk9 

P-TEFb small subunit

neutral component
Cdk9 

P-TEFb small subunit

neutral component
Cdk9 

P-TEFb small subunit

neutral component
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
Isoform-specific participants
Corresponds to
Description
Role
Note
Comments concerning this interaction

Source was nuclear extract of Kc cell line; proteins produced from endogenous genes.

FBrf0103005-1.CH.MS
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
CycT 

cyclin T

neutral component
CycT 

cyclin T

neutral component
CycT 

cyclin T

neutral component
Cdk9 

P-TEFb small subunit

neutral component
Cdk9 

P-TEFb small subunit

neutral component
Cdk9 

P-TEFb small subunit

neutral component
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
Isoform-specific participants
Corresponds to
Description
Role
Note
Comments concerning this interaction

Source was nuclear extract of Kc cell line; proteins produced from endogenous genes.

FBrf0103005-2.PD.MW
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
Cdk9 

CDK9

bait

His tag

CycT 

cyclin T

prey
CycT 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
CycT 
N-terminal region
sufficient binding region
aa 1-543
Isoform-specific participants
Corresponds to
Description
Role
Note
Comments concerning this interaction

Source was cell extract of baculovirus-infected Sf9 cell line; bait produced from transfected construct; prey produced from transfected construct.

Proteins were affinity purified, then further purified to homogeneity by ion exchange chromatography.

FBrf0202665-4.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
CycT 

CycT

bait

FLAG tag

Cdk9 

Cdk9

prey
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
Isoform-specific participants
Corresponds to
Description
Role
Note
Comments concerning this interaction

Source was cell extract of S2 cell line; bait produced from transfected construct; prey produced from endogenous gene.

FBrf0218395-10465.DPiM
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
Cdk9 
unspecified role
Cdk9 
unspecified role
Cdk9 
unspecified role
CycT 
unspecified role
CycT 
unspecified role
CycT 
unspecified role
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
Isoform-specific participants
Corresponds to
Description
Role
Note
Comments concerning this interaction

HGScore = 130.65773

FBrf0221247-1.Y2H
Reference
Description
physical association
Assay
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
Cdk9 

CDK9

bait

fused to GAL4 DNA-binding domain

CycT 

Cyclin T

prey

fused to GAL4 activation domain

CycT 
CycT 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
CycT 
Cyclin Box
sufficient binding region
aa 1-290
CycT 
Cyclin Box
mutation disrupting interaction
aa 126-129aa 17-234aa 125-186aa 93

K126L, E129K \'2xMut\' double mutant

6 dispersed mutations, \'I 1-7\' ts mutant, disrupts interaction at 30oC or higher

3 dispersed mutations, \'I 1-82\' ts mutant, disrupts interaction at 30oC or higher

N93D, \'III 6-14\' ts mutant, disrupts interaction at 36oC or higher

Isoform-specific participants
Corresponds to
Description
Role
Note
Comments concerning this interaction

Source was yeast cell line; bait produced as transgenic fusion protein; prey produced as transgenic fusion protein (prey was previously cloned reagent).

Two-hybrid system: yeast GAL4-BD/GAL4-AD

The CycT cyclin box was mutagenized and clones were screened for temperature sensitive perturbation of the CycT-Cdk9 P-TEFb heterodimer interaction.

External Crossreferences and Linkouts ( 1 )
Linkouts
MIST - An integrated Molecular Interaction Database
References (7)