FB2026_02 , released June 18, 2026
Physical Interaction report
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General Information
Interaction Type
Interacting Genes
FlyBase ID
FBig0000095674
Interaction Network
Interactions Browser links
fu network
Reported Interactions
FBrf0216910-2.FRET
Reference
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
fu 

Fu

bait

CFP tag

fu 

Fu

prey

YFP tag

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

Interaction inferred from the ability of excited CFP to induce YFP fluorescence.

fu dimerization is activated by treatment with hh-containing conditioned medium or expression of activated smo.

Bait expressed in transfected cells.

Prey expressed in transfected cells.

FBrf0216910-4.FRET
Reference
Description
physical association
Collection
Cell line used
Participants
Corresponds to
Reported as
Role
Note
fu 

Fu

bait

CFP tag

fu 

Fu

prey

YFP tag

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

Interaction inferred from the ability of excited CFP to induce YFP fluorescence.

fu dimerization in the wing disc is strongest near the anterior-posterior compartment boundary.

Bait derived from a transgenic line carrying a CFP-tagged UAS-cos construct, P{UAS-fu.CFP}.

Bait derived from a transgenic line carrying a YFP-tagged UAS-cos construct, P{UAS-fu.YFP}.

FBrf0217260-5.FRET
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
fu 

Fu

fluorescence donor

N-terminal CFP

fu 

Fu

fluorescence donor

N-terminal CFP

fu 

Fu

fluorescence acceptor

N-terminal YFP

fu 

Fu

fluorescence acceptor

N-terminal YFP

fu 

Fu

fluorescence donor

N-terminal CFP

fu 

Fu

fluorescence acceptor

N-terminal YFP

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 S2 cell line transfected with tagged fu constructs.

Separate molecules tagged with CFP and YFP; assaying homodimerization. FRET signal low in absence of hh protein, but high in presence of hh protein (in cell culture medium). Similar results with C-terminal fluorescent tags.

FBrf0217260-6.FRET
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
fu 

Fu

fluorescence donor

N-terminal CFP

fu 

Fu

fluorescence donor

N-terminal CFP

fu 

Fu

fluorescence acceptor

N-terminal YFP

fu 

Fu

fluorescence acceptor

N-terminal YFP

fu 

Fu

fluorescence donor

N-terminal CFP

fu 

Fu

fluorescence acceptor

N-terminal YFP

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 wing discs from transgenic line carrying tagged fu constructs.

Separate molecules tagged with CFP and YFP; assaying homodimerization.

FBrf0240921-5.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
fu 

Fu

bait

Myc tag

fu 

Fu

prey

HA tag

fu 
fu 
fu 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
fu 
regulatory domain
sufficient binding region
aa 303-422aa 422-805
fu 
regulatory domain
necessary binding region
aa 422-586
fu 
catalytic domain
sufficient binding region
aa 1-302
Isoform-specific participants
Corresponds to
Description
Role
Note
Comments concerning this interaction

The regulatory domain of fu binds its catalytic domain.

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

FBrf0244945-1.CH.MW
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
fu 

Fu

self

FLAG tag

fu 

Fu

self

FLAG tag

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

Interaction in vitro; proteins produced as a recombinant fusion proteins in baculovirus system.

FBrf0244945-2.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
fu 

Fu

bait

FLAG tag

fu 

Fu

prey
fu 
fu 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
fu 
kinase domain
sufficient binding region
aa 1-305

coordinates relative to fu-PA

fu 
C-terminal domain
sufficient binding region
aa 421-805

coordinates relative to fu-PA

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

Interaction in vitro; bait and prey produced as recombinant fusion proteins in baculovirus system.

FBrf0244945-3.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
fu 

Fu

self
fu 

Fu

self
fu 
fu 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
fu 
kinase domain
sufficient binding region
aa 1-305

coordinates relative to fu-PA

fu 
C-terminal domain
sufficient binding region
aa 421-805

coordinates relative to fu-PA

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

Interaction in vitro; bait and prey produced as recombinant fusion proteins in baculovirus system.

co-IPs carried out with either antibody specific to fu kinase domain or fu C-terminal domain demonstrating that the two domains interact with each other.

FBrf0244945-4.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
fu 

Fu

bait

His tag

fu 

Fu

prey
fu 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
fu 
C-terminal domain
sufficient binding region
aa 421-805

coordinates relative to fu-PA

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

Interaction in vitro; bait and prey produced as recombinant fusion proteins in baculovirus system.

External Crossreferences and Linkouts ( 0 )
References (4)