FB2026_03 , released September 17, 2026
Physical Interaction report
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General Information
Interaction Type
Interacting Genes
FlyBase ID
FBig0000105766
Interaction Network
Interactions Browser links
Khc network
Tm1 network
Reported Interactions
FBrf0234040-2.coIP.MS
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
Khc 

Khc

bait

GFP tag

Tm1 

Tropomyosin 1

prey

13 unique peptides identified

Tm1 
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 female ovaries of transgenic fly line; bait produced from tagged transgenic construct; prey produced from endogenous gene.

FBrf0234040-3.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
Khc 

Khc

bait

GFP tag

Tm1 

Tropomyosin 1

prey
Tm1 
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 female ovaries of transgenic fly line; bait produced from tagged transgenic construct; prey produced from endogenous gene.

Peptides of Tm1 identified in Khc purification map to the Tm1-PC isoform.

FBrf0234040-4.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
Tm1 

Tm1C

bait

GFP tag

Khc 

Khc

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 female ovaries of transgenic fly line; bait produced from tagged transgenic construct; prey produced from endogenous gene.

FBrf0234040-5.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
Tm1 

Tm1C

bait

GFP tag

Tm1 
Tm1 
Khc 

Khc

prey

RFP tag

Khc 
Khc 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
Khc 
interaction domain
sufficient binding region
aa 824-975

coordinates relative to Khc-PA

Khc 
interaction domain
necessary binding region
aa 914-936

coordinates relative to Khc-PA

Tm1 
coiled coil domain
sufficient binding region
aa 225-441

coordinates relative to Tm1-PC

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 transfected construct.

Khc interacts only with the Tm1 isoform C, not other Tm1 or Tm2 isoforms.

FBrf0234040-6.PD.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
Tm1 

Tm1

bait

GST tag

Tm1 
Khc 

Khc

prey

RFP tag

Khc 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
Khc 
interaction domain
sufficient binding region
aa 346-975

coordinates relative to Khc-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 by in vitro translation.

FBrf0234661-1.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
Tm1 

Tm1-I/C

bait

GFP tag

Khc 

Khc

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 female ovaries of transgenic fly line; bait produced from tagged transgenic construct; prey produced from endogenous gene.

FBrf0240258-4.coIP.WB
Reference
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
Tm1 

Tm1C

bait

TagRFP tag

Khc 

KHC

prey

GFP 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

Source was cell extract of HEK293 cell line; bait produced from transfected construct; prey produced from transfected construct.

FBrf0249394-1.Y2H
Description
physical association
Assay
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
Khc 

Khc

bait

fused to GAL4 DNA-binding domain

Khc 
Tm1 

αTm1

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
Khc 
C-terminal domain
sufficient binding region
aa 265-975

coordinates relative to Khc-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).

FBrf0249394-2.PD.MW
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
Khc 

Khc

bait

GST tag

Khc 
Tm1 

αTm1

prey

His,SUMO tag

Tm1 
Tm1 
Tm1 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
Khc 
cargo domain
sufficient binding region
aa 848-941

coordinates relative to Khc-PA

Tm1 
interaction domain
sufficient binding region
aa 247-335

coordinates relative to Tm1-PC

Tm1 
interaction domain
mutation disrupting interaction
aa 267,271

I267A,L271A, coordinates relative to Tm1-PC

Tm1 
interaction domain
mutation decreasing interaction
aa 271

L271A or L271R, coordinates relative to Tm1-PC

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.

FBrf0249394-4.CH.MW
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
Tm1 

αTm1

neutral component
Tm1 

αTm1

neutral component
Tm1 
Tm1 

αTm1

neutral component
Tm1 
Khc 

Khc

neutral component
Khc 
Khc 

Khc

neutral component
Khc 

Khc

neutral component
Khc 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
Khc 
cargo domain
sufficient binding region
aa 855-941

coordinates relative to Khc-PA

Tm1 
interaction domain
sufficient binding region
aa 252-334

coordinates relative to Tm1-PC

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

Interaction in vitro; proteins produced as recombinant fusion proteins in bacterial system.

FBrf0249394-5.SPR
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
Khc 

Khc

bait
Khc 
Tm1 

αTm1

prey
Tm1 
Tm1 
Tm1 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
Khc 
cargo domain
sufficient binding region
aa 848-941

coordinates relative to Khc-PA

Tm1 
interaction domain
sufficient binding region
aa 252-334

coordinates relative to Tm1-PC

Tm1 
interaction domain
mutation disrupting interaction
aa 267,271

I267A,L271A, coordinates relative to Tm1-PC

Tm1 
interaction domain
mutation decreasing interaction
aa 271

L271A, coordinates relative to Tm1-PC, Kd = 3.89uM

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.

FBrf0249394-6.XC
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
Tm1 

αTm1

neutral component
Tm1 
Tm1 

αTm1

neutral component
Tm1 
Tm1 

αTm1

neutral component
Khc 
Khc 

Khc

neutral component
Khc 

Khc

neutral component
Khc 
Khc 

Khc

neutral component
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
Khc 
cargo domain
sufficient binding region
aa 855-941

coordinates relative to Khc-PA

Tm1 
interaction domain
sufficient binding region
aa 252-334

coordinates relative to Tm1-PC

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

Tm1 and Khc form a trimeric complex with 2 parallel Khc chains and an antiparallel Tm1.

Interaction in vitro; proteins produced as recombinant fusion proteins in bacterial system.

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