FB2026_03 , released September 17, 2026
Physical Interaction report
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General Information
Interaction Type
Interacting Genes
FlyBase ID
FBig0000022268
Interaction Network
Interactions Browser links
Mis12 network
Nnf1a network
Reported Interactions
FBrf0200394-43.coIP.MS
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note

dmNnf1R-2

bait

Protein A tag

dmMis12

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 cell extract of S2 cell line; bait produced from transfected construct; prey produced from endogenous gene.

FBrf0200394-56.coIP.MS
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note

dmMis12

bait

Protein A tag

dmNnf1R-2

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 cell extract of S2 cell line; bait produced from transfected construct; prey produced from endogenous gene.

FBrf0208678-8.Y2H
Description
physical association
Assay
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note

Nnf1a

bait

fused to GAL4 DNA-binding domain

Mis12

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
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

FBrf0208678-9.Y2H
Description
physical association
Assay
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note

Mis12

bait

fused to GAL4 DNA-binding domain

Nnf1a

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
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

FBrf0218395-7024.DPiM
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
unspecified role
unspecified role
unspecified role
unspecified role
unspecified role
unspecified role
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

HGScore = 117.85467

FBrf0231098-1.PD.WB
Reference
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note

Nnf1a

bait

Strep tag

Mis12

prey

FLAG 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

Kmn1, Mis12, Nnf1a and Nnf1b were co-expressed (otherwise proteins were insoluble), then pulled down via either tagged Nnf1a or Nnf1b.

Mis12 interacts with either Nnf1a or Nnf1b in distinct complexes.

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

FBrf0231098-13.XL.MS
Reference
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note

Nnf1a

neutral component

Strep tag

Nnf1a

neutral component

Strep tag

Nnf1a

neutral component

Strep tag

Mis12

neutral component

FLAG tag

Mis12

neutral component

FLAG tag

Mis12

neutral component

FLAG 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

Kmn1, Mis12 and either Nnf1a or Nnf1b were coexpressed in E. coli (otherwise proteins were insoluble), then purified by gel filtration. The complex was then treated with BS2G bi-functional crosslinking reagent, and cross-links were mapped by mass spectrometry.

Within either the Kmn1-Mis12-Nnf1a or Kmn1-Mis12-Nnf1b trimeric complexes, all three subunits make extensive contacts with each other, extending along their entire sequences.

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

FBrf0231098-8.CH.MW
Reference
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note

Nnf1a

neutral component

Strep tag

Nnf1a

neutral component

Strep tag

Nnf1a

neutral component

Strep tag

Mis12

neutral component

FLAG tag

Mis12

neutral component

FLAG tag

Mis12

neutral component

FLAG 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

Kmn1, Mis12 and either Nnf1a or Nnf1b were coexpressed in E. coli (otherwise proteins were insoluble), then analyzed by gel filtration to assess complex formation.

Mis12 interacts with either Nnf1a or Nnf1b to form a dimer. Kmn1 can bind the Mis12-Nnf1a or Mis12-Nnf1b dimer to form a trimeric complex that is 64.5 kDa 67.1 kDa in size, respectively.

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

FBrf0231099-1.PD.MS
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note

Nnf1a

bait

His tag

Mis12

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

Mis12 and Nnf1a form a heterodimer. They were stable in bacteria only when coexpressed. The complex size was calculated by mass spectrometry to be 46.62 kDa, consistent with a 1:1 stoichiometry.

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

FBrf0231099-2.HDX.MS
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note

Nnf1a

neutral component

His tag

Nnf1a

neutral component

His tag

Nnf1a

neutral component

His tag

Mis12

neutral component

Mis12

neutral component

Mis12

neutral component
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
coiled coil domain
necessary binding region
aa 113-125
coiled coil domain
necessary binding region
aa 131-146
Isoform-specific participants
Corresponds to
Description
Role
Note
Comments concerning this interaction

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

The purified heterodimer was analysed by mass spectrometry to identify regions protected from hydrogen-deuterium (H/D), indicative of interacting surfaces.

FBrf0231099-25.Y2H
Description
physical association
Assay
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note

Nnf1a

bait

fused to GAL4 DNA-binding domain

Mis12

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
coiled coil domain residue 112
mutation disrupting interaction
aa 112

L112D

coiled coil domain residue 115
mutation disrupting interaction
aa 115

L115D

coiled coil domain residue 126
mutation disrupting interaction
aa 126

L126D

coiled coil domain residue 129
mutation disrupting interaction
aa 129

L129D

coiled coil domain residue 142
mutation disrupting interaction
aa 142

L142D

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

FBrf0231099-26.Y2H
Description
physical association
Assay
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note

Mis12

bait

fused to GAL4 DNA-binding domain

Nnf1a

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
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

FBrf0231099-3.coIP.MS
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note

Mis12

bait

GFP tag

Nnf1a

prey
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
coiled coil domain
sufficient binding region
aa 103-181
coiled coil domain
necessary binding region
aa 90-132
coiled coil domain residues 112-115
mutation disrupting interaction
aa 112-115

L112D, L115D

coiled coil domain residues 126-129
mutation disrupting interaction
aa 126-129

L126D, L129D

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 endogenous gene.

FBrf0231099-4.coIP.MS
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note

Nnf1a

bait

GFP tag

Mis12

prey
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
coiled coil domain
sufficient binding region
aa 122-194
coiled coil domain residue 142
mutation disrupting interaction
aa 142

L142D

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 endogenous gene.

External Crossreferences and Linkouts ( 1 )
Linkouts
MIST - An integrated Molecular Interaction Database
References (5)