FB2026_03 , released September 17, 2026
Physical Interaction report
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General Information
Interaction Type
Interacting Genes
FlyBase ID
FBig0000117626
Interaction Network
Interactions Browser links
crb network
apn network
Reported Interactions
FBrf0241226-1.UBR
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
crb 

crb

bait

ubiquitin tag, C-terminal fragment, lexA-VP16

crb 
apn 

apn

prey

ubiquitin tag, N-terminal fragment

Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
crb 
C-terminal domain
sufficient binding region
aa 2034-2189

coordinates relative to crb-PB

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 from embryo cDNA expression library).

Modified yeast two-hybrid for membrane proteins. A bait-prey interaction forms a ubiquitin molecule and allows release of the tethered transcription factor.

FBrf0241226-2.UBR
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
crb 

crb

bait

ubiquitin tag, C-terminal fragment, lexA-VP16

crb 
apn 

apn

prey

ubiquitin tag, N-terminal fragment

Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
crb 
C-terminal domain
sufficient binding region
aa 2034-2189

coordinates relative to crb-PB

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).

Modified yeast two-hybrid for membrane proteins. A bait-prey interaction forms a ubiquitin molecule and allows release of the tethered transcription factor.

FBrf0241226-3.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
apn 

Apn

bait
crb 

Crb

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 transfected construct.

FBrf0241226-4.PLA
Description
physical association
Collection
Cell line used
Participants
Corresponds to
Reported as
Role
Note
apn 

Apn

neutral component

GFP tag

apn 

Apn

neutral component

GFP tag

apn 

Apn

neutral component

GFP tag

crb 

Crb

neutral component
crb 

Crb

neutral component
crb 

Crb

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 larval trachea of wild-type fly line; proteins produced from endogenous gene or tagged transgenic construct.

The PLA signal develops only if probes to the two factors are in close proximity to each other (within tens of nanometers).

External Crossreferences and Linkouts ( 0 )
References (1)