FB2026_02 , released June 18, 2026
Physical Interaction report
Open Close
General Information
Interaction Type
Interacting Genes
FlyBase ID
FBig0000102618
Interaction Network
Interactions Browser links
SAK network
slmb network
Reported Interactions
FBrf0206754-1.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
slmb 

Slimb

bait
SAK 

Plk-4

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 endogenous gene; prey produced from transfected construct.

FBrf0206754-3.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
SAK 

Plk-4

bait

GFP tag

SAK 
slmb 

Slimb

prey
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
SAK 
interaction domain residues 293,297
mutation disrupting interaction
aa 293,297

S293A,T297A

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

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

FBrf0212014-2.coIP.MS
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
SAK 

Plk4

bait

Protein A tag

slmb 

Slimb

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.

FBrf0223435-3.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
SAK 

Plk4

bait

GFP tag

SAK 
SAK 
SAK 
SAK 
SAK 
slmb 

Slimb

prey
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
SAK 
phosphate anchor
mutation disrupting interaction
aa 22

K22M, one of three mutations in kinase-dead form

SAK 
nucleotide binding motif
mutation disrupting interaction
aa 43

K43M, one of three mutations in kinase-dead form

SAK 
activation loop
mutation disrupting interaction
aa 156

D156A, one of three mutations in kinase-dead form

SAK 
slimb-recognition motif
mutation disrupting interaction
aa 293

S293A

SAK 
slimb-recognition motif
mutation decreasing interaction
aa 297

T297A

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.

Mutation of SAK\'s kinase domain, or the autophosphorylated residue in the SRM disrupt slmb binding and prevent SAK polyubiquitination.

FBrf0223435-6.coIP.MS
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
SAK 

Plk4

bait

Protein A tag

SAK 
SAK 
SAK 
slmb 

Slimb

prey

18 unique peptides identified

Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
SAK 
phosphate anchor
mutation disrupting interaction
aa 22

K22M, one of three mutations in kinase-dead form

SAK 
nucleotide binding motif
mutation disrupting interaction
aa 43

K43M, one of three mutations in kinase-dead form

SAK 
activation loop
mutation disrupting interaction
aa 156

D156A, one of three mutations in kinase-dead form

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.

slmb does not interact with kinase-dead SAK.

FBrf0225974-2.PD.MS
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
SAK 

PLK4

bait

Protein A tag

SAK 
slmb 

Slimb

prey

18 unique peptides identified

Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
SAK 
kinase domain
mutation disrupting interaction
aa 22aa 43aa 146

K22M, one of three mutations in the kinase dead (KD) mutant

K43M, one of three mutations in the kinase dead (KD) mutant

D146A, one of three mutations in the kinase dead (KD) mutant

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.

Kinase dead SAK does not interact with slmb. This may explain why mutation of the SAK phosphorylation sites stabilizes SAK in S2 cells.

FBrf0225974-5.PD.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
SAK 

PLK4

bait

Protein A tag

SAK 
SAK 
slmb 

Slimb

prey

Myc tag

Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
SAK 
Slimb degron
mutation decreasing interaction
aa 293aa 297

S293A

T297A

SAK 
phospho cluster
mutation decreasing interaction
SGDSGIITFASSDSRNSQQIRSVE

S-to-A mutations, excluding S293 in Slimb degron DSGIIT

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.

Phosphorylation of the phospho cluster around the Slimb degron primes Thr297 phosphorylation, but does not affect Ser293 phosphorylation.

FBrf0227526-6.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
SAK 

Pkl4

bait

EGFP tag

slmb 

Slimb

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

At low levels of SAK expression, the depletion of asl increases the interaction between SAK and slmb.

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

FBrf0227526-8.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
SAK 

Pkl4

bait

EGFP tag

slmb 

Slimb

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

The addition of asl-A fragment (aa 1-357) is sufficient to induce interaction between slmb and SAK in the absence of endogenous asl.

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

FBrf0228377-2.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
SAK 

SAK

bait

GFP tag

SAK 
SAK 
SAK 
slmb 

slmb

prey
Experimental entities
Corresponds to
Identifier
Reported
Role
Note
Subregions with role in interaction
Corresponds to
Description
Role
Coordinates
Note
SAK 
PB1-PB2 domain
mutation decreasing interaction
aa 381-602
SAK 
PB3 domain
mutation decreasing interaction
aa 660-741
SAK 
kinase domain
mutation decreasing interaction
aa 172,176,181

T172A,T176A,S181A

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.

FBrf0240774-7.coIP.WB
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
SAK 

Plk4

bait

GFP tag

slmb 

Slimb

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

The addition of non-phoshorylatable asl increases the SAK-slmb interaction while a phosphomimetic decreases it.

Source was cell extract of S2 cell line; bait produced from transfected construct; prey produced from transfected construct.

FBrf0255743-13.PD.A
Description
physical association
Collection
Source/Stage
Cell line used
Participants
Corresponds to
Reported as
Role
Note
SAK 

Plk4

bait

MBP tag

slmb 

Slimb

prey

[35]S label

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 and labeled by in vitro translation.

External Crossreferences and Linkouts ( 1 )
Linkouts
MIST - An integrated Molecular Interaction Database
References (8)