FB2026_02 , released June 18, 2026
Physical Interaction report
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General Information
Interaction Type
Interacting Genes
FlyBase ID
FBig0000101264
Interaction Network
Interactions Browser links
PNUTS network
Polr2A network
Reported Interactions
FBrf0223236-6.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note

dPNUTS

bait

RNAPII

prey
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
C-terminal region
mutation increasing interaction
aa 631-1135

\'dPNUTS-S\', ΔC-terminus

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

Source was embryonic nuclear extract of wild-type fly line; bait produced from endogenous gene; prey produced from endogenous gene.

Deletion of the PNUTS PP1-binding motif increases the coimmunoprecipitation of hyper-phosphorylated RpII215 (RNAPIIo), but does not affect the interaction of PNUTS with hypophosphorylated RpII215 (RNAPIIa).

FBrf0223236-7.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note

dPNUTS

bait

Myc tag

RNAPII

prey
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
PP1-binding motif
mutation increasing interaction
aa 726

W726A

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

Source was embryonic nuclear extract of transgenic fly line; bait produced from tagged transgenic construct; prey produced from endogenous gene.

Ser5-phosphorylated RpII215 (RNAPII Ser5-P) coimmunoprecipitates with PNUTS if the PP1-binding motif is mutated, but not with wild-type PNUTS.

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