FB2026_02 , released June 18, 2026
Physical Interaction report
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General Information
Interaction Type
Interacting Genes
FlyBase ID
FBig0000104070
Interaction Network
Interactions Browser links
PlexB network
mys network
Reported Interactions
FBrf0231012-1.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note

PlexB

bait

Myc tag

mys 

Mys

prey

FLAG tag

mys 
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
mys 
ectodomain
sufficient binding region
aa 1-804
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.

FBrf0231012-2.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
mys 

Mys

bait

FLAG tag

PlexB

prey

Myc 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 S2 cell line; bait produced from transfected construct; prey produced from transfected construct.

FBrf0231012-3.PLA
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
mys 

Mys

neutral component

FLAG tag

mys 

Mys

neutral component

FLAG tag

mys 

Mys

neutral component

FLAG tag

PlexB

neutral component

Myc tag

PlexB

neutral component

Myc tag

PlexB

neutral component

Myc 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

Live S2 cells were incubated with anti-FLAG and anti-Myc to label only cell surface localized proteins. Cells were then fixed, and signal developed using proximity ligation assay in which a signal develops only both primary antibodies are within tens of nanometers.

Source was fixed S2 cell line; proteins produced from transfected construct.

FBrf0231012-4.PLA
Description
physical association
Collection
Cell line used
Participants
Corresponds to
Reported as
Role
Note
mys 

Mys

neutral component

FLAG tag

mys 

Mys

neutral component

FLAG tag

mys 

Mys

neutral component

FLAG tag

PlexB

neutral component

Myc tag

PlexB

neutral component

Myc tag

PlexB

neutral component

Myc 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

Live tissue was incubated with anti-FLAG and anti-Myc to label only cell surface localized proteins. Tissue was then fixed, and signal developed using proximity ligation assay in which a signal develops only both primary antibodies are within tens of nanometers.

Source was fixed larval body wall; proteins produced from tagged transgenic construct.

FBrf0255068-1.coIP.WB
Reference
Description
physical association
Collection
Cell line used
Participants
Corresponds to
Reported as
Role
Note
mys 

Mys

bait

GFP tag

PlexB

prey

Myc 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 larval brains of transgenic fly line; bait produced from tagged transgenic construct; prey produced from tagged transgenic construct.

Interaction between mys and PlexB abolished in an Sema2b null background.

FBrf0255068-6.PLA.FM
Reference
Description
physical association
Collection
Cell line used
Participants
Corresponds to
Reported as
Role
Note
mys 

Mys

neutral component

FLAG tag

mys 

Mys

neutral component

FLAG tag

mys 

Mys

neutral component

FLAG tag

PlexB

neutral component

Myc tag

PlexB

neutral component

Myc tag

PlexB

neutral component

Myc 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

Addition of PhTx increases interaction.

Source was larvae of transgenic fly line; E(bx) produced from tagged transgenic construct; dlg1 produced from endogenous gene.

FBrf0255068-7.PLA.FM
Reference
Description
physical association
Collection
Cell line used
Participants
Corresponds to
Reported as
Role
Note
mys 

Mys

neutral component

FLAG tag

mys 

Mys

neutral component

FLAG tag

mys 
mys 

Mys

neutral component

FLAG tag

mys 

PlexB

neutral component

Myc

PlexB

neutral component

Myc

PlexB

neutral component

Myc

Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
mys 
interaction domain residue 211
mutation increasing interaction
aa 211

coordinates relative to mys-PA

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

Source was larvae of transgenic fly line; E(bx) produced from tagged transgenic construct; dlg1 produced from endogenous gene.

Addition of PhTx increases interaction with wild-type mys.

External Crossreferences and Linkouts ( 1 )
Linkouts
MIST - An integrated Molecular Interaction Database
References (2)