FB2026_03 , released September 17, 2026
Physical Interaction report
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General Information
Interaction Type
Interacting Genes
FlyBase ID
FBig0000102142
Interaction Network
Interactions Browser links
sqd network
cup network
Reported Interactions
FBrf0203066-1.coIP.MS
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
sqd 

Sqd

bait
cup 

Cup

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 adult female ovaries of wild-type fly line; bait produced from endogenous gene; prey produced from endogenous gene.

Copurified proteins were identified only in sqd immunoprecipitation, and not in the negative control (dl immunoprecipitation).

FBrf0203066-12.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
sqd 

Sqd

bait

HA tag

cup 

Cup

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 adult female ovaries of transgenic fly line; bait produced from tagged transgenic construct; prey produced from endogenous gene.

cup interacts with both HA-tagged sqd isoforms tested (SqdA and SqdS).

FBrf0203066-6.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
sqd 

Sqd

bait
cup 

Cup

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 adult female ovaries of wild-type fly line; bait produced from endogenous gene; prey produced from endogenous gene.

The sqd-cup interaction is RNA-dependent (disrupted by RNase A).

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