FB2026_03 , released September 17, 2026
Physical Interaction report
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General Information
Interaction Type
Interacting Genes
FlyBase ID
FBig0000107885
Interaction Network
Interactions Browser links
crb network
par-6 network
Reported Interactions
FBrf0191891-1.Y2H
Description
physical association
Assay
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
crb 

Crb

bait

fused to GAL4 DNA-binding domain

crb 
crb 

DmPar-6

prey

fused to GAL4 activation domain

Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
crb 
intracellular domain
sufficient binding region
aa 2079-2146

coordinates relative to crb-PA

crb 
C-terminal ERLI motif
necessary binding region
ERLI

"ΔERLI" construct

PDZ domain
sufficient binding region
aa 156-261

coordinates relative to par-6-PA

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

FBrf0191891-3.PD.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
crb 

Crb

bait

GST tag

crb 
crb 

DmPar-6

prey
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
crb 
intracellular domain
sufficient binding region
aa 2079-2146

coordinates relative to crb-PA

crb 
C-terminal ERLI motif
necessary binding region
ERLI

"ΔERLI" construct

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

Interaction in vitro; bait produced as a recombinant fusion protein in bacterial system; prey derived from wild-type embryonic extract.

FBrf0191891-5.PD.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
crb 

Crb

bait

GST tag

crb 
crb 

DmPar-6

prey
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
crb 
intracellular domain
sufficient binding region
aa 2079-2146

coordinates relative to crb-PA

crb 
C-terminal ERLI motif
necessary binding region
ERLI

"ΔERLI" construct

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

Interaction in vitro; bait produced as a recombinant fusion protein in bacterial system; prey produced by in vitro translation.

FBrf0191891-8.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
crb 

Crb

bait

FLAG tag

crb 

DmPar-6

prey
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
crb 
intracellular domain
sufficient binding region
aa 2079-2146

coordinates relative to crb-PA

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.

FBrf0191891-9.PBD.FM
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
crb 

Crb

bait

fused to VSV-G protein

crb 

DmPar-6

prey

HA tag

Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
crb 
intracellular domain
sufficient binding region
aa 2079-2146

coordinates relative to crb-PA

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

Source was fixed S2 cells; bait produced from transfected construct; prey produced from transfected construct.

Bait protein was fused to an VSV-G protein, which targets the chimera to the plasma membrane. The ability of this chimera to recruit prey protein to plasma membrane was taken as evidence of direct physical interaction.

FBrf0233176-1.NMR
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
crb 

Crb

neutral component
crb 

Crb

neutral component
crb 
crb 

Crb

neutral component
crb 

Par-6

neutral component

Par-6

neutral component

Par-6

neutral component
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
PDZ domain
sufficient binding region
aa 156-255

coordinates relative to par-6-PA

crb 
C-terminus
sufficient binding region
PPEERLI
Isoform-specific participants
Corresponds to
Description
Role
Note
Comments concerning this interaction

Interaction in vitro; protein produced as a recombinant fusion proteins in bacterial system or chemically synthesized.

FBrf0233176-2.XC
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
crb 

Crb

neutral component
crb 

Crb

neutral component
crb 
crb 

Crb

neutral component
crb 

Par-6

neutral component

Par-6

neutral component

Par-6

neutral component
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
PDZ domain
sufficient binding region
aa 156-255

coordinates relative to par-6-PA

crb 
C-terminus
sufficient binding region
PPEERLI
Isoform-specific participants
Corresponds to
Description
Role
Note
Comments concerning this interaction

Interaction in vitro; protein produced as a recombinant fusion proteins in bacterial system or chemically synthesized.

FBrf0243203-2.PD.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
crb 

Crb

bait

GST tag

crb 
crb 

Par6

prey

FLAG tag

Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
crb 
intracellular domain
sufficient binding region
aa 1-96,2136-2203

coordinates relative to crb-PD

crb 
C-terminal domain
necessary binding region
aa 2000-2203

deletion of C-terminal ERLI, coordinates relative to crb-PD

PDZ domain residues 170-173
mutation disrupting interaction
aa 170-173

KPLG to AAAA

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

Interaction in vitro; bait produced as a recombinant fusion protein in bacterial system; prey derived from transfected S2R+ cell extract.

External Crossreferences and Linkouts ( 1 )
Linkouts
MIST - An integrated Molecular Interaction Database
References (3)