FB2026_03 , released September 17, 2026
Physical Interaction report
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General Information
Interaction Type
Interacting Genes
FlyBase ID
FBig0000103769
Interaction Network
Interactions Browser links
arm network
Axn network
Reported Interactions
FBrf0107755-1.PD.A
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
arm 

arm

bait

GST tag

arm 
Axn 

d-axin

prey

[35]S label

Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
arm 
arm repeat domain
sufficient binding region
aa 140-713
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 and labeled by in vitro translation.

FBrf0107755-2.PD.A
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
Axn 

d-axin

bait

GST tag

Axn 
arm 

arm

prey

[35]S label

Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
Axn 
interaction domain
sufficient binding region
aa 459-538
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 and labeled by in vitro translation.

FBrf0158859-2.Y2H
Description
physical association
Assay
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
arm 

Arm

bait

fused to GAL4 DNA-binding domain

Axn 

Axin

prey

fused to GAL4 activation domain

Axn 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
Axn 
C-terminal region
sufficient binding region
aa 418-745
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).

The Axn N-terminal region inhibits the Axn-arm interaction.

Two-hybrid system: yeast GAL4-BD/GAL4-AD

Positive control.

FBrf0209417-1.Y2H
Description
physical association
Assay
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
arm 

Armadillo

bait

fused to GAL4 DNA-binding domain

Axn 

Axin

prey

fused to GAL4 activation domain

Axn 
Axn 
Axn 
Axn 
Axn 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
Axn 
Armadillo binding region residue L501
mutation disrupting interaction
aa 501

L501P or L501Q, coordinates relative to Axn-PA

Axn 
Armadillo binding region residue D502
mutation decreasing interaction
aa 502

coordinates relative to Axn-PA

Axn 
Armadillo binding region residue Q503
mutation decreasing interaction
aa 503

coordinates relative to Axn-PA

Axn 
Armadillo binding region residue H504
mutation disrupting interaction
aa 504

H504L or H504R or L501Q, coordinates relative to Axn-PA

Axn 
Armadillo binding region residue W509
mutation decreasing interaction
aa 509

coordinates relative to Axn-PA

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

Two-hybrid system: yeast GAL4-BD/GAL4-AD

Source was yeast cell line; bait produced as transgenic fusion protein; prey produced as transgenic fusion protein (prey was previously cloned reagent).

Saturating mutagenesis of Axn prey to identify mutations that disrupt binding. Western blotting eliminated lost interaction due to nonsense mutations. Since clones contained, on average, 3 mutation each, single point mutations were subsequently tesetd.

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