KIF2B

gene
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Summary

KIF2B (kinesin family member 2B, HGNC:29443) is a protein-coding gene on chromosome 17q22, encoding Kinesin-like protein KIF2B (Q8N4N8). Plus end-directed microtubule-dependent motor required for spindle assembly and chromosome movement.

Predicted to enable ATP hydrolysis activity; microtubule binding activity; and microtubule motor activity. Involved in metaphase chromosome alignment; microtubule depolymerization; and regulation of chromosome segregation. Predicted to be located in cytosol. Predicted to be part of kinesin complex. Predicted to be active in cytoplasm and microtubule cytoskeleton.

Source: NCBI Gene 84643 — RefSeq curated summary.

At a glance

  • GWAS associations: 10
  • Clinical variants (ClinVar): 112 total
  • MANE Select transcript: NM_032559

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:29443
Approved symbolKIF2B
Namekinesin family member 2B
Location17q22
Locus typegene with protein product
StatusApproved
Ensembl geneENSG00000141200
Ensembl biotypeprotein_coding
OMIM615142
Entrez84643

Gene structure

Transcript identifiers

Ensembl transcripts: 1 — 1 protein_coding

ENST00000268919

RefSeq mRNA: 1 — MANE Select: NM_032559 NM_032559

CCDS: CCDS32685

Canonical transcript exons

ENST00000268919 — 1 exons

ExonStartEnd
ENSE000009469985382292753825193

Expression profiles

Bgee: expression breadth broad, 21 present calls, max score 97.86.

FANTOM5 (CAGE): breadth tissue_specific, TPM avg 0.4073 / max 447.9274, expressed in 8 samples.

FANTOM5 promoters (3 alternative TSS)

Promoter IDTPM avgSamples expressed
1617560.39476
1617580.00843
1617570.00423

Top tissues by expression

228 total, by Bgee expression score (0-100, higher = more expressed):

TissueAnatomy IDExpression scoreQuality
spermCL:000001997.86gold quality
left testisUBERON:000453394.06gold quality
right testisUBERON:000453493.74gold quality
male germ line stem cell (sensu Vertebrata) in testisCL:0000089 ∩ UBERON:000047393.33gold quality
testisUBERON:000047391.54gold quality
adult organismUBERON:000702384.08gold quality
tibialis anteriorUBERON:000138560.55silver quality
pancreatic ductal cellCL:000207959.43silver quality
deltoidUBERON:000147657.46gold quality
epithelial cell of pancreasCL:000008354.58gold quality
cardiac muscle of right atriumUBERON:000337954.34gold quality
left ventricle myocardiumUBERON:000656654.23gold quality
kidney epitheliumUBERON:000481953.93gold quality
upper arm skinUBERON:000426353.52gold quality
ileal mucosaUBERON:000033151.23silver quality
myocardiumUBERON:000234950.25gold quality
cerebellar vermisUBERON:000472049.72gold quality
quadriceps femorisUBERON:000137748.21silver quality
nasal cavity epitheliumUBERON:000538447.03gold quality
vastus lateralisUBERON:000137945.66gold quality
layer of synovial tissueUBERON:000761643.55gold quality
skeletal muscle tissue of rectus abdominisUBERON:000451143.37gold quality
secondary oocyteCL:000065542.57gold quality
middle temporal gyrusUBERON:000277142.55gold quality
skeletal muscle tissueUBERON:000113442.39gold quality
muscle tissueUBERON:000238542.26gold quality
thymusUBERON:000237041.42gold quality
superficial temporal arteryUBERON:000161441.33gold quality
colonic epitheliumUBERON:000039741.32gold quality
upper leg skinUBERON:000426241.21silver quality

Single-cell (SCXA)

Detected in 1 experiment(s), a significant marker in 0.

ExperimentMarker?Max mean expression
E-ANND-3no1.48

Regulation

Is transcription factor: no

miRNA regulators (miRDB)

16 targeting KIF2B, top 30 by miRDB confidence (max_score; target_count = how many genes the miRNA targets in total — lower means more specific):

miRNAMax scoreAvg scoremiRNA target_count
HSA-MIR-103A-3P99.9869.141595
HSA-MIR-10799.9869.141595
HSA-MIR-365899.9673.874379
HSA-MIR-7856-5P99.7569.992901
HSA-MIR-182799.6368.573265
HSA-MIR-29899.6367.561916
HSA-MIR-7152-5P99.6069.332094
HSA-MIR-486-5P99.5170.39707
HSA-MIR-127699.3668.181642
HSA-MIR-223-5P99.2468.821206
HSA-MIR-4520-2-3P99.1469.281009
HSA-MIR-3074-5P98.8266.561414
HSA-MIR-4520-3P98.7566.55963
HSA-MIR-6511A-5P98.1367.471770
HSA-MIR-3664-3P97.8567.621452
HSA-MIR-441897.0467.161372

Literature-anchored findings (GeneRIF, showing 9)

  • when microtubules are absent, the neck linker exists in equilibrium between two structural states; microtubule binding may activate the nucleotide-sensing mechanism of kinesin (PMID:12368902)
  • kinesin-I-dependent neuronal AbetaPP transport, which controls AbetaPP processing, may be regulated by JIP1 (PMID:12893827)
  • These data demonstrate that Kif2b function is required for spindle assembly and chromosome movement and that the microtubule depolymerase activities of Kif2a, Kif2b, and MCAK fulfill distinct functions during mitosis in human cells. (PMID:17538014)
  • Here we show that two microtubule-depolymerizing kinesins, Kif2b and MCAK, stimulate kinetochore-microtubule dynamics during distinct phases of mitosis to correct mal-orientations. (PMID:19060894)
  • Data show that CLASP1-astrin-Kif2b complex acts as a central switch at kinetochores that defines mitotic progression and promotes fidelity by temporally regulating kinetochore-microtuble attachments. (PMID:20852589)
  • Data show that Polo-like kinase 1 (Plk1) regulates both the localization and activity of kinesin-13 protein Kif2b during mitosis to promote the correction of k-MT attachment errors to ensure mitotic fidelity. (PMID:22535524)
  • Data indicate that Cep170 association with the C-terminus of Kif2b enhances localization of Kif2b to the spindle. (PMID:23087211)
  • GSK3beta-SKAP-Kif2b signaling axis constitutes a dynamic link between spindle microtubule plus-ends and mitotic chromosomes to achieve faithful cell division. (PMID:27982129)
  • Chromosomal instability suppresses the growth of K-Ras-induced lung adenomas. (PMID:31179849)

Cross-species orthologs

2 orthologs

OrganismSymbolGene ID
mus_musculusKif2bENSMUSG00000046755
rattus_norvegicusKif2bENSRNOG00000086201

Paralogs (41): KIF1B (ENSG00000054523), KIF26A (ENSG00000066735), KIF2A (ENSG00000068796), KIF22 (ENSG00000079616), KIF3C (ENSG00000084731), KIF9 (ENSG00000088727), KIF16B (ENSG00000089177), KIF4A (ENSG00000090889), KIF3B (ENSG00000101350), KIF20A (ENSG00000112984), KIF21B (ENSG00000116852), KIF17 (ENSG00000117245), KIF14 (ENSG00000118193), KIF18A (ENSG00000121621), KIF25 (ENSG00000125337), KIF1C (ENSG00000129250), KIF1A (ENSG00000130294), KIF3A (ENSG00000131437), KIF12 (ENSG00000136883), KIF13A (ENSG00000137177), KIF23 (ENSG00000137807), KIF11 (ENSG00000138160), CENPE (ENSG00000138778), KIF21A (ENSG00000139116), KIFC3 (ENSG00000140859), KIF2C (ENSG00000142945), KIF5A (ENSG00000155980), KIF26B (ENSG00000162849), KIF15 (ENSG00000163808), KIF6 (ENSG00000164627), KIF27 (ENSG00000165115), KIF7 (ENSG00000166813), KIFC2 (ENSG00000167702), KIF5C (ENSG00000168280), KIF5B (ENSG00000170759), KIF18B (ENSG00000186185), KIF24 (ENSG00000186638), KIF19 (ENSG00000196169), KIF13B (ENSG00000197892), KIF4B (ENSG00000226650)

Protein

Protein identifiers

Kinesin-like protein KIF2BQ8N4N8 (reviewed: Q8N4N8)

All UniProt accessions (2): A0A140VKG5, Q8N4N8

UniProt curated annotations — full annotation on UniProt →

Function. Plus end-directed microtubule-dependent motor required for spindle assembly and chromosome movement. Has microtubule depolymerization activity. Plays a role in chromosome congression.

Subcellular location. Cytoplasm. Cytoskeleton. Microtubule organizing center. Centrosome. Spindle. Chromosome. Centromere. Kinetochore.

Tissue specificity. Highest level in lung. High level in ovary, moderate levels in heart, kidney, placenta, skeletal muscle and spleen (at protein level). Pancreas and spleen express a shorter isoform (at protein level).

Post-translational modifications. Phosphorylation at Thr-125 by PLK1 is required for activity in the correction of kinetochore-microtubules attachment errors, while phosphorylation at Ser-204 also by PLK1 is required for the kinetochore localization and activity in prometaphase.

Miscellaneous. Osteosarcoma cells (U2OS) lacking KIF2B show disorganised often monopolar mitotic spindles, severely reduced velocity of chromosome movement and blocked cytokinesis. Bipolar mitotic spindles can be restored by simultaneous depletion of KIF2B, KIFC1 and NUMA1.

Similarity. Belongs to the TRAFAC class myosin-kinesin ATPase superfamily. Kinesin family. MCAK/KIF2 subfamily.

RefSeq proteins (1): NP_115948* (*=MANE)

Domains & families (InterPro)

IDNameType
IPR001752Kinesin_motor_domDomain
IPR019821Kinesin_motor_CSConserved_site
IPR027417P-loop_NTPaseHomologous_superfamily
IPR027640Kinesin-like_famFamily
IPR036961Kinesin_motor_dom_sfHomologous_superfamily
IPR054473KIF2A-like_NDomain

Pfam: PF00225, PF22923

UniProt features (19 total): sequence conflict 7, sequence variant 5, coiled-coil region 2, modified residue 2, chain 1, domain 1, binding site 1

Structure

Experimental structures (PDB)

0 structures.

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-Q8N4N8-F172.930.34

Functional residue map

Curated UniProt residues grouped by drug-discovery relevance — catalytic, ligand-binding, modification, and mutation-validated positions. Source: UniProtKB sequence features.

Ligand- & substrate-binding residues (1): 303–310

Post-translational modifications (2): 125, 204

Function

Pathways and Gene Ontology

Reactome pathways

29 pathways

IDPathway
R-HSA-141444Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal
R-HSA-2132295MHC class II antigen presentation
R-HSA-2467813Separation of Sister Chromatids
R-HSA-2500257Resolution of Sister Chromatid Cohesion
R-HSA-5663220RHO GTPases Activate Formins
R-HSA-6811434COPI-dependent Golgi-to-ER retrograde traffic
R-HSA-68877Mitotic Prometaphase
R-HSA-9648025EML4 and NUDC in mitotic spindle formation
R-HSA-983189Kinesins
R-HSA-109582Hemostasis
R-HSA-1280218Adaptive Immune System
R-HSA-141424Amplification of signal from the kinetochores
R-HSA-162582Signal Transduction
R-HSA-1640170Cell Cycle
R-HSA-168256Immune System
R-HSA-194315Signaling by Rho GTPases
R-HSA-195258RHO GTPase Effectors
R-HSA-199991Membrane Trafficking
R-HSA-2555396Mitotic Metaphase and Anaphase
R-HSA-5653656Vesicle-mediated transport
R-HSA-6811442Intra-Golgi and retrograde Golgi-to-ER traffic
R-HSA-68882Mitotic Anaphase
R-HSA-68886M Phase
R-HSA-69278Cell Cycle, Mitotic
R-HSA-69618Mitotic Spindle Checkpoint
R-HSA-69620Cell Cycle Checkpoints
R-HSA-8856688Golgi-to-ER retrograde transport
R-HSA-9716542Signaling by Rho GTPases, Miro GTPases and RHOBTB3
R-HSA-983231Factors involved in megakaryocyte development and platelet production

MSigDB gene sets: 105 (showing top): REACTOME_ADAPTIVE_IMMUNE_SYSTEM, GOBP_CHROMOSOME_LOCALIZATION, GOCC_KINESIN_COMPLEX, REACTOME_MEMBRANE_TRAFFICKING, HATADA_METHYLATED_IN_LUNG_CANCER_DN, GOCC_MICROTUBULE_ORGANIZING_CENTER, GOBP_MICROTUBULE_DEPOLYMERIZATION, GOBP_REGULATION_OF_CHROMOSOME_SEGREGATION, OCT1_03, GOBP_REGULATION_OF_CELL_CYCLE, GOMF_CYTOSKELETAL_MOTOR_ACTIVITY, GOCC_CENTROSOME, AFP1_Q6, GOBP_PROTEIN_DEPOLYMERIZATION, GOBP_REGULATION_OF_CELL_CYCLE_PROCESS

GO Biological Process (5): microtubule-based movement (GO:0007018), microtubule depolymerization (GO:0007019), cell division (GO:0051301), metaphase chromosome alignment (GO:0051310), regulation of chromosome segregation (GO:0051983)

GO Molecular Function (6): microtubule motor activity (GO:0003777), ATP binding (GO:0005524), microtubule binding (GO:0008017), ATP hydrolysis activity (GO:0016887), nucleotide binding (GO:0000166), cytoskeletal motor activity (GO:0003774)

GO Cellular Component (10): kinetochore (GO:0000776), cytoplasm (GO:0005737), centrosome (GO:0005813), spindle (GO:0005819), cytosol (GO:0005829), kinesin complex (GO:0005871), microtubule (GO:0005874), chromosome, centromeric region (GO:0000775), chromosome (GO:0005694), cytoskeleton (GO:0005856)

Reactome top-level categories

Rollup of top-13 pathways:

CategoryPathways
Mitotic Prometaphase2
M Phase2
Amplification of signal from the kinetochores1
Adaptive Immune System1
Mitotic Anaphase1
RHO GTPase Effectors1
Golgi-to-ER retrograde transport1
Factors involved in megakaryocyte development and platelet production1
Immune System1
Mitotic Spindle Checkpoint1
Signaling by Rho GTPases, Miro GTPases and RHOBTB31
Signaling by Rho GTPases1
Vesicle-mediated transport1

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
intracellular membraneless organelle4
ATP-dependent activity2
cellular anatomical structure2
microtubule cytoskeleton2
microtubule-based process1
microtubule polymerization or depolymerization1
protein depolymerization1
supramolecular fiber organization1
cellular process1
chromosome localization1
nuclear chromosome segregation1
chromosome segregation1
regulation of cell cycle process1
cytoskeletal motor activity1
polypeptide conformation or assembly isomerase activity1
adenyl ribonucleotide binding1
purine ribonucleoside triphosphate binding1
tubulin binding1
ribonucleoside triphosphate phosphatase activity1
nucleoside phosphate binding1
heterocyclic compound binding1
molecular_function1
condensed chromosome, centromeric region1
supramolecular complex1
intracellular anatomical structure1
centriole1
microtubule organizing center1
cytoplasm1
microtubule associated complex1
polymeric cytoskeletal fiber1
chromosomal region1

Protein interactions and networks

STRING

1230 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
KIF2BCLASP1Q7Z460901
KIF2BCEP170Q5SW79788
KIF2BAURKBQ96GD4599
KIF2BNDC80O14777544
KIF2BBUB1O43683527
KIF2BPLK1P53350520
KIF2BCAMKMTQ7Z624509
KIF2BSPAG5Q96R06506
KIF2BDYNLL2Q96FJ2498
KIF2BBUB1BO60566469
KIF2BCKAP5Q14008461
KIF2BCLASP2O75122453
KIF2BCLASRPQ8N2M8447
KIF2BKNSTRNQ9Y448447
KIF2BFAM227BQ96M60444

IntAct

12 interactions, top by confidence:

ABTypeScore
KIF2Breppsi-mi:“MI:0915”(physical association)0.550
KIF2BBACH1psi-mi:“MI:0914”(association)0.530
KIF2BH1-5psi-mi:“MI:0915”(physical association)0.400
KIF2BBICD2psi-mi:“MI:0915”(physical association)0.400
KIF2BSTAU1psi-mi:“MI:0915”(physical association)0.400
Prdm16ESYT2psi-mi:“MI:0914”(association)0.350
MecomESYT2psi-mi:“MI:0914”(association)0.350
repURB1psi-mi:“MI:0914”(association)0.350
KIF2BHERC2psi-mi:“MI:0914”(association)0.350

BioGRID (90): SIKE1 (Affinity Capture-MS), DAPK3 (Affinity Capture-MS), CEP170B (Affinity Capture-MS), SAV1 (Affinity Capture-MS), BACH1 (Affinity Capture-MS), SPC25 (Affinity Capture-MS), TXLNG (Affinity Capture-MS), KLC4 (Affinity Capture-MS), CEP170 (Affinity Capture-MS), STK3 (Affinity Capture-MS), HOMER1 (Affinity Capture-MS), MIS12 (Affinity Capture-MS), CCDC22 (Affinity Capture-MS), VPS8 (Affinity Capture-MS), KLC1 (Affinity Capture-MS)

ESM2 similar proteins: A0A1L8GXY4, A0A1L8I2C5, A1A5R7, A6PWY4, A9X1C6, B1ANS9, B2KIQ4, D3Z3I0, E9Q7R9, F1QHZ6, O13286, O74845, O94411, P26309, P43254, P51956, P93471, Q09786, Q4V837, Q5R6T6, Q5TKR9, Q5XHI9, Q5ZKI7, Q6DTM3, Q6GM71, Q6GPU3, Q6VZ17, Q7Z2W4, Q80Z32, Q86VD1, Q86Y33, Q8BZ21, Q8CDP0, Q8K3E5, Q8L4H0, Q8N157, Q8N4N8, Q8NA75, Q8NDM7, Q8NEM8

Diamond homologs: A0A068FIK2, A1ZAJ2, A6H750, A8BKD1, B7EJ91, B7ZNG0, B9EY52, B9F2Y7, B9F7C8, B9FMJ3, E2RTQ2, F1M4A4, F4ICA0, F4IIS5, F4K0J3, L0N7N1, O00139, O14343, O15066, O23826, O35071, O35787, O43896, O45935, O59751, O60282, O95239, P21613, P23678, P28740, P28741, P33173, P33174, P33176, P46863, P46867, P46874, P53086, P70096, P82266

SIGNOR signaling

5 interactions.

AEffectBMechanism
PLK1“up-regulates activity”KIF2Bphosphorylation
KIF2Bdown-regulatesMitotic_checkpoint
KNSTRN“down-regulates activity”KIF2Brelocalization
KIF2Bup-regulates“Minus-end directed microtubule movement”

Disease & clinical

Clinical variants and AI predictions

ClinVar

112 variants total. Per-class counts are floors (≥ shown; pagination cap):

ClassificationCount (floor)
Pathogenic0
Likely pathogenic0
Uncertain significance102
Likely benign8
Benign2

Top pathogenic / likely-pathogenic (0)

SpliceAI

18 predictions. Top by Δscore:

VariantEffectΔscore
17:53823727:GACC:Gdonor_gain0.2800
17:53823950:G:Tdonor_gain0.2700
17:53823950:G:GTdonor_gain0.2600
17:53824967:T:TAacceptor_gain0.2600
17:53823690:G:GTdonor_gain0.2300
17:53823989:G:GTdonor_gain0.2300
17:53824917:TG:Tdonor_gain0.2300
17:53824918:GG:Gdonor_gain0.2300
17:53824228:G:GTdonor_gain0.2100
17:53823866:T:Adonor_gain0.2000
17:53824190:T:TAdonor_loss0.2000
17:53824208:AAGAG:Adonor_loss0.2000
17:53824209:AGAGG:Adonor_loss0.2000
17:53824210:GAGGT:Gdonor_loss0.2000
17:53824211:AGGT:Adonor_loss0.2000
17:53824212:GGTG:Gdonor_loss0.2000
17:53824213:GTGT:Gdonor_loss0.2000
17:53824214:T:Gdonor_loss0.2000

AlphaMissense

4428 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
17:53823871:T:GY280D0.977
17:53823928:T:CC299R0.974
17:53824642:G:CA537P0.974
17:53823690:G:CR219S0.969
17:53823690:G:TR219S0.969
17:53823823:T:CF264L0.967
17:53823825:C:AF264L0.967
17:53823825:C:GF264L0.967
17:53824643:C:AA537E0.964
17:53823829:T:CF266L0.960
17:53823831:C:AF266L0.960
17:53823831:C:GF266L0.960
17:53823884:C:AA284D0.960
17:53823680:T:AV216D0.956
17:53823170:T:AV46D0.955
17:53824042:T:CF337L0.955
17:53824044:T:AF337L0.955
17:53824044:T:GF337L0.955
17:53823841:T:CF270L0.954
17:53823843:C:AF270L0.954
17:53823843:C:GF270L0.954
17:53823211:T:AW60R0.950
17:53823211:T:CW60R0.950
17:53824513:T:CF494L0.946
17:53824515:C:AF494L0.946
17:53824515:C:GF494L0.946
17:53823164:C:AA44D0.945
17:53824355:G:AG441D0.943
17:53823200:T:AV56D0.939
17:53823931:T:CF300L0.939

dbSNP variants (sampled 300 via entrez): RS1001128863 (17:53824145 A>C,T), RS1005210451 (17:53822730 T>A,C), RS1005264267 (17:53822516 G>T), RS1006226691 (17:53825277 C>A,T), RS1007481877 (17:53821652 T>C), RS1007884592 (17:53821254 T>C), RS1008113239 (17:53823997 C>A,G,T), RS1009148564 (17:53822694 A>G), RS1009572223 (17:53822893 C>T), RS1009696541 (17:53824369 G>A,C,T), RS1010756273 (17:53825504 A>G), RS1011405161 (17:53821598 A>G,T), RS1012633958 (17:53822465 A>C), RS1012681383 (17:53822188 G>A), RS1014012793 (17:53822014 A>G)

Disease associations

OMIM: gene MIM:615142 | disease phenotypes:

GenCC curated gene-disease

Mondo (0):

Orphanet (0):

HPO phenotypes

0 total (0 of 0 shown, HPO-id order):

GWAS associations

10 associations (top):

StudyTraitp-value
GCST003992_21Photic sneeze reflex2.000000e-08
GCST009379_210Type 2 diabetes2.000000e-08
GCST009391_121Metabolite levels8.000000e-06
GCST009391_1213Metabolite levels1.000000e-07
GCST009391_1846Metabolite levels4.000000e-06
GCST009391_275Metabolite levels1.000000e-06
GCST009391_315Metabolite levels8.000000e-06
GCST009391_949Metabolite levels2.000000e-06
GCST010151_28Carotid intima media thickness x smoking interaction4.000000e-06
GCST010988_63Adult body size3.000000e-08

EFO canonical traits (8, from GWAS)

EFO IDTrait name
EFO:0007887autosomal dominant compelling helio-ophthalmic outburst syndrome
EFO:0010354diacylglycerol 36:1 measurement
EFO:0010420triacylglycerol 54:2 measurement
EFO:0010413triacylglycerol 52:1 measurement
EFO:0010429triacylglycerol 56:2 measurement
EFO:0010430triacylglycerol 56:3 measurement
EFO:0010403triacylglycerol 48:0 measurement
EFO:0006527smoking status measurement

Drugs & pharmacology

Drug and pharmacology data

Is drug target: no

PharmGKB: 1 entry (VIP=true, CPIC=false)

CTD chemical–gene interactions

2 total (human), top 2 by PubMed support.

ChemicalActions (top 5)PubMed papers
Benzo(a)pyreneaffects methylation, decreases methylation, increases methylation2
Methotrexateincreases expression1

Clinical trials (associated diseases)

0 trials via MONDO — disease-level, not drug-specific.

No linked Atlas pages yet — the cross-entity mesh grows as the corpus expands.