FB2026_03 , released September 17, 2026
Physical Interaction report
Open Close
General Information
Interaction Type
Interacting Genes
FlyBase ID
FBig0000098997
Interaction Network
Interactions Browser links
inaD network
trp network
Reported Interactions
FBrf0087705-1.FW.A
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
trp 

TRP

bait

GST tag

trp 
trp 
inaD 

INAD

prey

[35]S label

inaD 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
trp 
C-terminal region
sufficient binding region
aa 1257-1275

coordinates relative to trp-PA

trp 
C-terminal region
necessary binding region
aa 1267-1275

coordinates relative to trp-PA

inaD 
central region
mutation disrupting interaction
aa 442

M442K, coordinates relative to inaD-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.

FBrf0087705-2.FW.A
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
inaD 

INAD

bait

GST tag

inaD 
trp 

TRP

prey

[35]S label

trp 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
trp 
C-terminal region
sufficient binding region
aa 1257-1275

coordinates relative to trp-PA

inaD 
central region
sufficient binding region
aa 347-450

coordinates relative to inaD-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.

FBrf0096480-1.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
inaD 

inaD

bait
trp 

TRP

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 membranes from adult heads of wild-type or mutant fly line; bait produced from endogenous gene; prey produced from endogenous gene.

trp, norpA and inaC, but not ninaE or Gαq, coimmunoprecipitate with inaD.

FBrf0096480-4.PD.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
inaD 

INAD

bait

GST tag

inaD 
trp 

TRP

prey
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
inaD 
PDZ3 domain
sufficient binding region
aa 362-449

coordinates relative to inaD-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 derived from wild-type adult head extract.

FBrf0108298-4.coIP.WB
Reference
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
inaD 

INAD

bait
trp 

TRP

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 adult heads from wild type fly line; bait produced from endogenous gene; prey produced from endogenous gene.

FBrf0125268-4.coIP.MW
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
trp 

TRP

bait
inaD 

INAD

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 adult head membrane extract of wild-type fly line; bait produced from endogenous gene; prey produced from endogenous gene.

FBrf0129943-1.PD.A
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
trp 

TRP

bait

GST tag

trp 
trp 
inaD 

INAD

prey

[35]S label

Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
trp 
C-terminal region
sufficient binding region
aa 1247-1275

coordinates relative to trp-PA

trp 
C-terminal region
necessary binding region
aa 1272-1275

"Δ1272" construct, coordinates relative to trp-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.

FBrf0129943-2.PD.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
trp 

TRP

bait

GST tag

trp 
trp 
trp 
inaD 

INAD

prey
inaD 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
trp 
C-terminal region
sufficient binding region
aa 1247-1275

coordinates relative to trp-PA

trp 
C-terminal region
necessary binding region
aa 1272-1275

"Δ"1272 construct, coordinates relative to trp-PA

trp 
C-terminal region residue V1266
mutation decreasing interaction
aa 1266

V1266D, coordinates relative to trp-PA

inaD 
PDZ3 domain
mutation disrupting interaction
aa 442

M442K, coordinates relative to inaD-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 derived from adult head extract.

FBrf0204232-1.FW.A
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
trp 

TRP

bait

GST tag

trp 
trp 
trp 
trp 
trp 
trp 
trp 
trp 
inaD 

INAD

prey

[35]S label

Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
trp 
C-terminal region
sufficient binding region
aa 1262-1275

coordinates relative to trp-PA

trp 
C-terminal region residue K1263
mutation decreasing interaction
aa 1263

K1263A or K1263D, coordinates relative to trp-PA

trp 
C-terminal region residue S1264
mutation disrupting interaction
aa 1264

S1264T, coordinates relative to trp-PA

trp 
C-terminal region residue T1265
mutation decreasing interaction
aa 1265

T1265P, coordinates relative to trp-PA

trp 
C-terminal region residue V1266
mutation disrupting interaction
aa 1266

V1266D or V1266A, coordinates relative to trp-PA

trp 
C-terminal region residue G1262
mutation decreasing interaction
aa 1262

G1262A or G1262D, coordinates relative to trp-PA

trp 
C-terminal region residue W1274
mutation disrupting interaction
aa 1274

W1274D or W1274A, coordinates relative to trp-PA

trp 
C-terminal region residue L1275
mutation disrupting interaction
aa 1275

L1275D or L1275A, coordinates relative to trp-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.

FBrf0204232-2.PD.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
trp 

TRP

bait

GST tag

trp 
inaD 

INAD

prey
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
trp 
C-terminal region
sufficient binding region
aa 1262-1275

coordinates relative to trp-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 derived from adult head extract.

FBrf0214003-3.FPS
Reference
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
inaD 

INAD

bait
inaD 
trp 

Trp

prey
trp 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
inaD 
PDZ5 domain
sufficient binding region
aa 580-665

coordinates relative to inaD-PA

trp 
region
sufficient binding region
TGRMISGWL
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 peptide chemically synthesized and labeled in vitro.

The inaD PDZ5 domain binds trp peptide with Kd = 140uM (relatively weak).

FBrf0214003-4.NMR
Reference
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
inaD 

INAD

neutral component
inaD 

INAD

neutral component
inaD 
inaD 

INAD

neutral component
inaD 
trp 

TRP

neutral component
trp 
trp 

TRP

neutral component
trp 

TRP

neutral component
trp 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
inaD 
PDZ45 domain
sufficient binding region
aa 473-674

coordinates relative to inaD-PA

trp 
C-terminal region
sufficient binding region
aa 1261-1275

coordinates relative to trp-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 peptide chemically synthesized and labeled in vitro.

inaD binds two discrete sites in the trp C-terminal tail. The inaD PDZ3 domain binds to the trp C-terminal STV sequence (aa 1264-1266) and inaD PDZ4-5 domains bind to the trp C-terminal GWL sequence (aa 1273-1275).

FBrf0222115-3.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
trp 

TRP

bait

GFP tag

inaD 

INAD

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

Transgenic trp expressed in photoreceptor cells. Anti-GFP antibody used for immunoprecipitation.

The interaction of GFP-tagged trp with inaD is not observed in a trp9 mutant background. The interpretation is that the GFP tag disrupts direct trp-inaD interaction, but that GFP-trp exists in heteromultimers with wild-type trp proteins that do interact with inaD.

Source was adult heads of transgenic fly line; bait produced from tagged transgenic construct; prey produced from endogenous gene.

FBrf0222115-4.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
trp 

TRP

bait
inaD 

INAD

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 adult heads of transgenic fly line; bait produced from endogenous gene; prey produced from endogenous gene.

FBrf0229940-2.PD.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
trp 

TRP

bait

SBP tag

inaD 

INAD

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 adult heads of transgenic fly line; bait produced from tagged transgenic construct; prey produced from endogenous gene.

SBP-tagged proteins pulled down using streptavidin beads.

Positive control.

FBrf0231190-1.PD.CH
Reference
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
inaD 

INAD

bait

His tag

inaD 
trp 

TRP

prey

GB1 tag

trp 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
inaD 
PDZ3
sufficient binding region
aa 351-448

coordinates relative to inaD-PA

trp 
C-terminal region
sufficient binding region
aa 1261-1275

coordinates relative to trp-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 as a recombinant fusion protein in bacterial system.

inaD and trp were co-expressed in bacterial cells and purified by His-tag affinity and size exclusion to obtain a complex for further analysis.

FBrf0231190-2.NMR
Reference
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
inaD 

INAD

neutral component

His tag

inaD 

INAD

neutral component

His tag

inaD 
inaD 

INAD

neutral component

His tag

inaD 
trp 

TRP

neutral component
trp 
trp 

TRP

neutral component
trp 

TRP

neutral component
trp 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
inaD 
PDZ3
sufficient binding region
aa 351-448

coordinates relative to inaD-PA

trp 
C-terminal region
sufficient binding region
aa 1261-1275

coordinates relative to trp-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 as a recombinant fusion protein in bacterial system.

inaD and trp were co-expressed in bacterial cells and purified by His-tag affinity and size exclusion to obtain a complex for further analysis.

FBrf0231190-3.CS
Reference
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
inaD 

INAD

neutral component

His tag

inaD 

INAD

neutral component

His tag

inaD 
inaD 

INAD

neutral component

His tag

inaD 
trp 

TRP

neutral component
trp 
trp 

TRP

neutral component
trp 

TRP

neutral component
trp 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
inaD 
PDZ3
sufficient binding region
aa 351-448

coordinates relative to inaD-PA

trp 
C-terminal region
sufficient binding region
aa 1261-1275

coordinates relative to trp-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 as a recombinant fusion protein in bacterial system.

inaD PDZ3 domain binds the trp C-terminal region with Kd = 0.13uM.

inaD and trp were co-expressed in bacterial cells and purified by His-tag affinity and size exclusion to obtain a complex for further analysis.

FBrf0231190-4.PD.MW
Reference
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
trp 

TRP

bait

GST tag

trp 
inaD 

INAD

prey

His tag

inaD 
inaD 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
inaD 
PDZ3
sufficient binding region
aa 351-448

coordinates relative to inaD-PA

inaD 
PDZ3 residue M442
mutation decreasing interaction
aa 442

M442K, coordinates relative to inaD-PA

trp 
C-terminal region
sufficient binding region
aa 1261-1275

coordinates relative to trp-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 as a recombinant fusion protein in bacterial system.

FBrf0235287-1.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
trp 

trp

bait
inaD 

inaD

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 adult heads of wild-type fly line; bait produced from endogenous gene; prey produced from endogenous gene.

FBrf0246134-4.PD.MS
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
trp 

TRP

bait

SBP tag

inaD 

INAD

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 adult heads of transgenic fly line; bait produced from tagged transgenic construct; prey produced from endogenous gene.

External Crossreferences and Linkouts ( 1 )
Linkouts
MIST - An integrated Molecular Interaction Database
References (12)