FB2026_03 , released September 17, 2026
Physical Interaction report
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General Information
Interaction Type
Interacting Genes
FlyBase ID
FBig0000108582
Interaction Network
Interactions Browser links
arm network
lgs network
Reported Interactions
FBrf0146918-1.Y2H
Description
physical association
Assay
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
lgs 

Lgs

bait

fused to LexA DNA-binding domain

lgs 
lgs 
arm 

Arm

prey

fused to B42 activation domain

Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
lgs 
N-terminal region
sufficient binding region
aa 364-555

coordinates relative to lgs-PA

lgs 
HD2 region
necessary binding region
aa 515-549

coordinates relative to lgs-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 from embryo cDNA expression library).

Two-hybrid system: yeast LexA-BD/B42-AD

FBrf0146918-2.PD.A
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
arm 

Arm

bait

GST tag

lgs 

Lgs

prey

[35]S label

lgs 
lgs 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
lgs 
HD2 region
sufficient binding region
aa 511-551

coordinates relative to lgs-PA

lgs 
HD2 region
necessary binding region
aa 515-555

coordinates relative to lgs-PA

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.

FBrf0146918-3.PD.A
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
lgs 

Lgs

bait

GST tag

lgs 
arm 

Arm

prey

[35]S label

arm 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
lgs 
N-terminal region
sufficient binding region
aa 1-732

coordinates relative to lgs-PA

arm 
Armadillo repeats 1-4
sufficient binding region
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.

FBrf0174791-2.PD.A
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
arm 

ARD

bait

GST tag

arm 
lgs 

Lgs

prey

[35]S label

lgs 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
arm 
armadillo repeat domain
sufficient binding region
lgs 
HD1 and HD2 regions
sufficient binding region
aa 233-555

coordinates relative to lgs-PA

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.

Positive control.

FBrf0180142-1.Y2H
Description
physical association
Assay
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
arm 

Arm

bait
arm 
lgs 

Lgs

prey
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
arm 
Armadillo repeat 1 residue D172
mutation disrupting interaction
aa 172

D172A (corresponds to human β-Cat D164A), coordinates relative to arm-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

FBrf0191135-2.Y2H
Description
physical association
Assay
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
arm 

Arm

bait

fused to LexA DNA-binding domain

arm 
arm 
lgs 

Lgs

prey

fused to GAL4 activation domain

lgs 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
arm 
Armadillo repeats 1-4
sufficient binding region
aa 156-356

coordinates relative to arm-PA

arm 
Armadillo repeats 1-4 residue D172
mutation disrupting interaction
aa 172

D172A (D164 refers to human β-Cat ortholog), coordinates relative to arm-PA

lgs 
HD2 region
sufficient binding region
aa 465-596

coordinates relative to lgs-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

External Crossreferences and Linkouts ( 1 )
Linkouts
MIST - An integrated Molecular Interaction Database
References (4)