FB2026_03 , released September 17, 2026
Physical Interaction report
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General Information
Interaction Type
Interacting Genes
FlyBase ID
FBig0000108504
Interaction Network
Interactions Browser links
ProtB network
dhd network
Reported Interactions
FBrf0234485-10.PD.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note

ProtB

bait

GST tag

dhd 

DHD

prey

V5 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

Interaction in vitro; bait produced as a recombinant fusion protein in bacterial system; prey produced as a recombinant fusion protein in bacterial system.

FBrf0234485-6.CH.MW
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note

ProtB

neutral component

ProtB

neutral component

ProtB

neutral component
dhd 

DHD

neutral component

V5 tag

dhd 

DHD

neutral component

V5 tag

dhd 

DHD

neutral component

V5 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

dhd, but not Trx-2, associates with ProtB in high molecular weight sperm chromatin.

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

Purified dhd was mixed with model sperm chromatin (purified ProtB on plasmid DNA).

FBrf0234485-7.ENZ.WB
Reference
Description
Assay
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
dhd 

DHD

enzyme
dhd 

DHD

enzyme

ProtB

enzyme target

V5 tag

ProtB

enzyme target

V5 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
FBrf0234485-8.CM.MW
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note

ProtB

neutral component

ProtB

neutral component

ProtB

neutral component
dhd 

DHD

neutral component
dhd 

DHD

neutral component
dhd 

DHD

neutral component
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

An apparent, covalently linked ProtB-dhd heterodimer was observed in non-reducing SDS-PAGE.

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

Model sperm chromatin (ProtB oligomers on plasmid DNA) was treated with dhd, then subjected to low resolution gel filtration to separate chromatin from dissociated ProtB. Each gel filtration fractions was then treated with DNase to remove DNA and subjected to non-reducing SDS-PAGE and western blot to assess the monomeric-oligomeric state of ProtB.

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