KLHL18

gene
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Also known as KIAA0795FLJ13703

Summary

KLHL18 (kelch like family member 18, HGNC:29120) is a protein-coding gene on chromosome 3p21.31, encoding Kelch-like protein 18 (O94889). Substrate-specific adapter of a BCR (BTB-CUL3-RBX1) E3 ubiquitin-protein ligase complex required for mitotic progression and cytokinesis.

Predicted to enable ubiquitin-like ligase-substrate adaptor activity. Involved in positive regulation of mitotic cell cycle phase transition and protein ubiquitination. Predicted to be part of Cul3-RING ubiquitin ligase complex. Predicted to be active in cytoplasm.

Source: NCBI Gene 23276 — RefSeq curated summary.

At a glance

  • GWAS associations: 2
  • Clinical variants (ClinVar): 81 total
  • MANE Select transcript: NM_025010

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:29120
Approved symbolKLHL18
Namekelch like family member 18
Location3p21.31
Locus typegene with protein product
StatusApproved
AliasesKIAA0795, FLJ13703
Ensembl geneENSG00000114648
Ensembl biotypeprotein_coding
OMIM619926
Entrez23276

Gene structure

Transcript identifiers

Ensembl transcripts: 7 — 3 protein_coding, 2 nonsense_mediated_decay, 1 retained_intron, 1 protein_coding_CDS_not_defined

ENST00000232766, ENST00000433449, ENST00000437353, ENST00000442272, ENST00000461084, ENST00000483201, ENST00000964342

RefSeq mRNA: 1 — MANE Select: NM_025010 NM_025010

CCDS: CCDS33749

Canonical transcript exons

ENST00000232766 — 10 exons

ExonStartEnd
ENSE000011727944734355547346816
ENSE000034665504733468347334819
ENSE000035214184734271947342830
ENSE000035394964733315747333317
ENSE000035749194733653547336757
ENSE000035997514731965347319783
ENSE000036157764732995147330149
ENSE000036687614732256847322708
ENSE000036760954734057247340676
ENSE000038508434728294447283094

Expression profiles

Bgee: expression breadth ubiquitous, 240 present calls, max score 94.46.

FANTOM5 (CAGE): breadth ubiquitous, TPM avg 8.6025 / max 267.7466, expressed in 1792 samples.

FANTOM5 promoters (3 alternative TSS)

Promoter IDTPM avgSamples expressed
365365.30451742
365342.01731095
365351.2807746

Top tissues by expression

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

TissueAnatomy IDExpression scoreQuality
secondary oocyteCL:000065594.46gold quality
apex of heartUBERON:000209894.13gold quality
gastrocnemiusUBERON:000138894.10gold quality
hindlimb stylopod muscleUBERON:000425293.79gold quality
muscle of legUBERON:000138393.37gold quality
monocyteCL:000057692.80gold quality
mononuclear cellCL:000084292.57gold quality
leukocyteCL:000073891.90gold quality
oocyteCL:000002391.72gold quality
heart left ventricleUBERON:000208490.74gold quality
cardiac ventricleUBERON:000208290.08gold quality
right atrium auricular regionUBERON:000663189.46gold quality
skeletal muscle organUBERON:001489287.31gold quality
muscle organUBERON:000163087.29gold quality
heartUBERON:000094887.12gold quality
cardiac atriumUBERON:000208186.55gold quality
primordial germ cell in gonadCL:0000670 ∩ UBERON:000099186.29gold quality
skin of legUBERON:000151185.98gold quality
skin of abdomenUBERON:000141685.32gold quality
cortical plateUBERON:000534384.78gold quality
lower esophagus mucosaUBERON:003583484.62gold quality
middle temporal gyrusUBERON:000277184.50gold quality
granulocyteCL:000009484.30gold quality
zone of skinUBERON:000001484.18gold quality
stromal cell of endometriumCL:000225584.16gold quality
left adrenal glandUBERON:000123484.02gold quality
cervix squamous epitheliumUBERON:000692283.93silver quality
left adrenal gland cortexUBERON:003582583.88gold quality
esophagus mucosaUBERON:000246983.68gold quality
right adrenal glandUBERON:000123383.31gold quality

Single-cell (SCXA)

Detected in 2 experiment(s), a significant marker in 1.

ExperimentMarker?Max mean expression
E-ANND-3yes3.89
E-MTAB-7249no54.81

Regulation

Is transcription factor: no

miRNA regulators (miRDB)

167 targeting KLHL18, 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-9-5P100.0072.282361
HSA-MIR-4533100.0069.482758
HSA-MIR-5193100.0067.261744
HSA-MIR-4713-3P100.0065.92505
HSA-MIR-4283100.0066.422097
HSA-MIR-4692100.0067.322066
HSA-MIR-4510100.0066.602050
HSA-MIR-6127100.0066.762188
HSA-MIR-6129100.0066.462080
HSA-MIR-6130100.0066.692012
HSA-MIR-6133100.0066.482064
HSA-MIR-4673100.0066.641490
HSA-MIR-548AW99.9972.573559
HSA-MIR-607799.9968.042299
HSA-MIR-451499.9967.101870
HSA-MIR-314899.9775.066478
HSA-MIR-7152-3P99.9767.47849
HSA-MIR-302E99.9670.742669
HSA-MIR-1468-3P99.9672.743797
HSA-MIR-145-5P99.9271.131836
HSA-MIR-5195-3P99.9270.921877
HSA-MIR-497-5P99.9271.832674
HSA-MIR-129799.9173.413162
HSA-MIR-6809-3P99.9171.453814
HSA-MIR-498-3P99.9171.271114
HSA-MIR-4753-3P99.9071.033786
HSA-MIR-15A-5P99.9072.802787
HSA-MIR-15B-5P99.9072.782798
HSA-MIR-16-5P99.9072.802780
HSA-MIR-195-5P99.9072.812805

Cross-species orthologs

5 orthologs

OrganismSymbolGene ID
danio_rerioklhl18ENSDARG00000004306
mus_musculusKlhl18ENSMUSG00000054792
rattus_norvegicusKlhl18ENSRNOG00000020880
drosophila_melanogasterKLHL18FBGN0037978
caenorhabditis_elegansWBGENE00002185

Paralogs (54): KLHL13 (ENSG00000003096), KLHL20 (ENSG00000076321), KEAP1 (ENSG00000079999), KLHL42 (ENSG00000087448), KLHL22 (ENSG00000099910), KLHL4 (ENSG00000102271), KLHL2 (ENSG00000109466), KLHL5 (ENSG00000109790), BACH2 (ENSG00000112182), KLHL24 (ENSG00000114796), IVNS1ABP (ENSG00000116679), KLHL12 (ENSG00000117153), KLHL29 (ENSG00000119771), KBTBD7 (ENSG00000120696), KLHL7 (ENSG00000122550), KLHL31 (ENSG00000124743), KLHDC7B (ENSG00000130487), KLHL36 (ENSG00000135686), KLHL8 (ENSG00000145332), KLHL3 (ENSG00000146021), KLHL35 (ENSG00000149243), KLHL1 (ENSG00000150361), BACH1 (ENSG00000156273), KLHL40 (ENSG00000157119), KLHL10 (ENSG00000161594), KLHL21 (ENSG00000162413), KLHDC8A (ENSG00000162873), KBTBD8 (ENSG00000163376), KBTBD6 (ENSG00000165572), KLHL26 (ENSG00000167487), KLHL30 (ENSG00000168427), KBTBD2 (ENSG00000170852), KLHL6 (ENSG00000172578), KLHL15 (ENSG00000174010), KLHL38 (ENSG00000175946), KBTBD11 (ENSG00000176595), KLHDC7A (ENSG00000179023), KLHL28 (ENSG00000179454), KBTBD3 (ENSG00000182359), KLHL33 (ENSG00000185271)

Protein

Protein identifiers

Kelch-like protein 18O94889 (reviewed: O94889)

All UniProt accessions (4): C9J4G4, O94889, F8WCL4, F8WF78

UniProt curated annotations — full annotation on UniProt →

Function. Substrate-specific adapter of a BCR (BTB-CUL3-RBX1) E3 ubiquitin-protein ligase complex required for mitotic progression and cytokinesis. The BCR(KLHL18) E3 ubiquitin ligase complex mediates the ubiquitination of AURKA leading to its activation at the centrosome which is required for initiating mitotic entry. Regulates light-and dark-dependent alpha-transducin localization changes in rod photoreceptors through UNC119 ubiquitination and degradation. Preferentially ubiquitinates the unphosphorylated form of UNC119 over the phosphorylated form. In the presence of UNC119, under dark-adapted conditions alpha-transducin mislocalizes from the outer segment to the inner part of rod photoreceptors which leads to decreased photoreceptor damage caused by light.

Subunit / interactions. Interacts with AURKA. Interacts (via BTB domain) with CUL3. Interacts (via kelch repeats) with UNC119.

Pathway. Protein modification; protein ubiquitination.

Isoforms (2)

UniProt IDNamesCanonical?
O94889-11yes
O94889-22

RefSeq proteins (1): NP_079286* (*=MANE)

Domains & families (InterPro)

IDNameType
IPR000210BTB/POZ_domDomain
IPR006652Kelch_1Repeat
IPR011333SKP1/BTB/POZ_sfHomologous_superfamily
IPR011705BACKDomain
IPR015915Kelch-typ_b-propellerHomologous_superfamily
IPR017096BTB-kelch_proteinFamily
IPR030603KLHL18_BTB/POZDomain

Pfam: PF00651, PF01344, PF07707, PF24681

UniProt features (10 total): repeat 6, domain 2, chain 1, splice variant 1

Structure

Experimental structures (PDB)

0 structures.

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-O94889-F193.410.85

Function

Pathways and Gene Ontology

Reactome pathways

0 pathways

MSigDB gene sets: 225 (showing top): MORF_RAGE, MORF_FLT1, TGCGCANK_UNKNOWN, MORF_MSH3, TGCTGCT_MIR15A_MIR16_MIR15B_MIR195_MIR424_MIR497, SP3_Q3, MORF_BRCA1, MORF_ATRX, GOBP_CELL_CYCLE_PHASE_TRANSITION, GOBP_POSITIVE_REGULATION_OF_MITOTIC_CELL_CYCLE, GOBP_MACROMOLECULE_CATABOLIC_PROCESS, TAL1ALPHAE47_01, MORF_ESR1, MODULE_16, CCATCCA_MIR432

GO Biological Process (4): protein ubiquitination (GO:0016567), proteasome-mediated ubiquitin-dependent protein catabolic process (GO:0043161), cell division (GO:0051301), positive regulation of mitotic cell cycle phase transition (GO:1901992)

GO Molecular Function (2): ubiquitin-like ligase-substrate adaptor activity (GO:1990756), protein binding (GO:0005515)

GO Cellular Component (2): cytoplasm (GO:0005737), Cul3-RING ubiquitin ligase complex (GO:0031463)

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
protein modification by small protein conjugation1
ubiquitin-dependent protein catabolic process1
proteasomal protein catabolic process1
cellular process1
mitotic cell cycle phase transition1
positive regulation of mitotic cell cycle1
positive regulation of cell cycle phase transition1
regulation of mitotic cell cycle phase transition1
enzyme-substrate adaptor activity1
binding1
intracellular anatomical structure1
cellular anatomical structure1
cullin-RING ubiquitin ligase complex1

Protein interactions and networks

STRING

932 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
KLHL18KIF9Q9HAQ2582
KLHL18TBRG4Q969Z0557
KLHL18KCTD2Q14681532
KLHL18ESPNLQ6ZVH7531
KLHL18CCDC12Q8WUD4513
KLHL18BTBD7Q9P203493
KLHL18CUL3Q13618491
KLHL18UBAP2LQ14157489
KLHL18DHRS7BQ6IAN0474
KLHL18SLC25A21Q9BQT8473
KLHL18EXTL3O43909462
KLHL18ADRA2CP18825456
KLHL18DAB2IPQ5VWQ8438
KLHL18DEPDC4Q8N2C3438
KLHL18TRAM2Q15035435

IntAct

51 interactions, top by confidence:

ABTypeScore
COPS6RHOBTB1psi-mi:“MI:0914”(association)0.730
EEF1GKLHL18psi-mi:“MI:0915”(physical association)0.560
KLHL18PRKNpsi-mi:“MI:0915”(physical association)0.560
EIF4EBP3EIF4E2psi-mi:“MI:0914”(association)0.550
COPS5KLHL18psi-mi:“MI:0914”(association)0.530
CUL3RHOBTB1psi-mi:“MI:0914”(association)0.530
CUL3ZSWIM8psi-mi:“MI:0914”(association)0.530
UBE2MRHOBTB1psi-mi:“MI:0914”(association)0.530
GPS1PXDNLpsi-mi:“MI:0914”(association)0.530
COPS6KLHL18psi-mi:“MI:0914”(association)0.530
CFHKLHL18psi-mi:“MI:0915”(physical association)0.400
KLHL18CFTRpsi-mi:“MI:0915”(physical association)0.370
CFTRKLHL18psi-mi:“MI:0915”(physical association)0.370
KLHL18EEF1Gpsi-mi:“MI:0915”(physical association)0.370
NEK4E2F8psi-mi:“MI:0914”(association)0.350
DCUN1D1RGSL1psi-mi:“MI:0914”(association)0.350
COPS5FBLL1psi-mi:“MI:0914”(association)0.350
COPS6DDX3Xpsi-mi:“MI:0914”(association)0.350
CUL3PXDNLpsi-mi:“MI:0914”(association)0.350

BioGRID (76): KLHL18 (Two-hybrid), KLHL18 (Affinity Capture-MS), KLHL18 (Affinity Capture-MS), KLHL18 (Affinity Capture-MS), SUGT1 (Affinity Capture-MS), NUDCD3 (Affinity Capture-MS), KLHL18 (Two-hybrid), KLHL18 (Affinity Capture-MS), CUL3 (Affinity Capture-Western), KLHL18 (Affinity Capture-Western), KLHL18 (Affinity Capture-Western), AURKA (Affinity Capture-Western), AURKA (Reconstituted Complex), AURKA (Biochemical Activity), RBX1 (Affinity Capture-Western)

ESM2 similar proteins: A0A2R8Q1W5, A6QQY2, B0WWP2, B3NDN0, B4HIK1, B4L0G9, B4LIG6, B4PD06, D3Z8N4, E0CZ16, E1B932, E7F6F9, E9Q4F2, F1LZ52, O94889, P28575, P57790, P59280, Q08DK3, Q14145, Q16RL8, Q2T9Z7, Q53G59, Q5R774, Q5R7B8, Q5U374, Q5ZKD9, Q5ZLD3, Q684M4, Q6DFF6, Q6JEL2, Q6JEL3, Q6NRH0, Q6TDP3, Q6TDP4, Q6ZPT1, Q7QGL0, Q80TF4, Q8BZM0, Q8K430

Diamond homologs: A0A2R8Q1W5, A9JRD8, B0WWP2, B3DIV9, B3M9V8, B3NDN0, B4GRJ2, B4HIK1, B4J045, B4L0G9, B4LIG6, B4MXW3, B4PD06, B4QLQ2, D3Z8N4, D3ZUU2, E0CZ16, E1B932, E7F6F9, E9Q4F2, F1LZ52, F1LZF0, F1MBP6, G3X9X1, O15062, O93567, O94889, O95198, P28575, P57790, Q04652, Q08DK3, Q13105, Q14145, Q16RL8, Q1ECZ2, Q2M0J9, Q2TBA0, Q3SWU4, Q3ZB90

SIGNOR signaling

2 interactions.

AEffectBMechanism
KLHL18“up-regulates activity”AURKAbinding
KLHL18“up-regulates activity”“Cullin 3-RBX1-Skp1”binding

Enriched among interaction partners

Reactome pathways and GO biological processes over-represented among this gene’s 46 IntAct physical interaction partners (hypergeometric vs the genome-wide background, BH-FDR, gene-set size 15–500, ranked by fold). A functional readout of the neighbourhood — distinct from this gene’s own memberships above, and biased toward well-studied / hub proteins, so read it as themes rather than proof.

Reactome pathways:

PathwayPartnersFoldFDR
DNA Damage Recognition in GG-NER653.5×6e-08
Formation of TC-NER Pre-Incision Complex639.6×3e-07
Cargo recognition for clathrin-mediated endocytosis619.6×1e-05
Neddylation1217.8×1e-10
Antigen processing: Ubiquitination & Proteasome degradation67.0×4e-03

GO biological processes:

GO termPartnersFoldFDR
regulation of protein neddylation7159.8×2e-12
protein neddylation9154.1×6e-16
ubiquitin-dependent protein catabolic process59.1×1e-02
protein ubiquitination77.1×4e-03

Disease & clinical

Clinical variants and AI predictions

ClinVar

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

ClassificationCount (floor)
Pathogenic0
Likely pathogenic0
Uncertain significance71
Likely benign1
Benign0

Top pathogenic / likely-pathogenic (0)

SpliceAI

1890 predictions. Top by Δscore:

VariantEffectΔscore
3:47283092:AAGGT:Adonor_loss1.0000
3:47283094:GGTA:Gdonor_loss1.0000
3:47283096:T:Adonor_loss1.0000
3:47319772:A:Tdonor_gain1.0000
3:47319779:CCAAG:Cdonor_loss1.0000
3:47319780:CAAGG:Cdonor_loss1.0000
3:47319781:AAGGT:Adonor_loss1.0000
3:47319782:AGGTA:Adonor_loss1.0000
3:47319783:GGT:Gdonor_loss1.0000
3:47319784:GTACT:Gdonor_loss1.0000
3:47319785:T:Adonor_loss1.0000
3:47322565:TA:Tacceptor_loss1.0000
3:47322566:A:AGacceptor_gain1.0000
3:47322566:AGT:Aacceptor_gain1.0000
3:47322567:G:GCacceptor_gain1.0000
3:47322567:GT:Gacceptor_gain1.0000
3:47322567:GTG:Gacceptor_gain1.0000
3:47322567:GTGC:Gacceptor_gain1.0000
3:47322567:GTGCC:Gacceptor_gain1.0000
3:47322704:GAACG:Gdonor_gain1.0000
3:47322708:GGT:Gdonor_loss1.0000
3:47322709:G:GGdonor_gain1.0000
3:47322710:T:Adonor_loss1.0000
3:47329942:A:AGacceptor_gain1.0000
3:47329942:AT:Aacceptor_gain1.0000
3:47329943:T:Gacceptor_gain1.0000
3:47329943:T:TAacceptor_gain1.0000
3:47329947:A:AGacceptor_gain1.0000
3:47329947:AAAG:Aacceptor_gain1.0000
3:47329948:A:Gacceptor_gain1.0000

AlphaMissense

3782 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
3:47283090:T:AL42H1.000
3:47283090:T:CL42P1.000
3:47319675:C:AA51D1.000
3:47319681:G:CR53P1.000
3:47319687:T:AV55D1.000
3:47319690:T:CL56S1.000
3:47319723:T:CF67S1.000
3:47322688:C:GC127W1.000
3:47336661:G:AG342E1.000
3:47336723:T:AW363R1.000
3:47336723:T:CW363R1.000
3:47336755:A:CR373S1.000
3:47336755:A:TR373S1.000
3:47340616:G:AG389E1.000
3:47342720:T:AW410R1.000
3:47342720:T:CW410R1.000
3:47342750:C:AR420S1.000
3:47283060:G:CR32P0.999
3:47283063:G:CR33P0.999
3:47283075:T:CL37P0.999
3:47283080:G:CD39H0.999
3:47283081:A:TD39V0.999
3:47283084:T:AV40E0.999
3:47319677:C:GH52D0.999
3:47319678:A:GH52R0.999
3:47319679:C:AH52Q0.999
3:47319679:C:GH52Q0.999
3:47319692:G:CA57P0.999
3:47319693:C:AA57E0.999
3:47319695:G:CA58P0.999

dbSNP variants (sampled 300 via entrez): RS1000007578 (3:47314755 CT>C), RS1000049746 (3:47316889 G>T), RS1000058195 (3:47321346 G>T), RS1000063514 (3:47308671 G>A), RS1000241339 (3:47322727 C>A,T), RS1000254724 (3:47335625 A>G), RS1000287465 (3:47308883 A>G), RS1000363506 (3:47328713 G>T), RS1000423124 (3:47296118 G>C), RS1000521840 (3:47320878 A>G), RS1000522206 (3:47337561 C>T), RS1000585521 (3:47335916 G>A,T), RS1000650394 (3:47344706 C>T), RS1000684943 (3:47290104 C>T), RS1000703647 (3:47297906 G>A)

Disease associations

OMIM: gene MIM:619926 | disease phenotypes:

GenCC curated gene-disease

Mondo (0):

Orphanet (0):

HPO phenotypes

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

GWAS associations

2 associations (top):

StudyTraitp-value
GCST004691_3Huntington’s disease progression2.000000e-06
GCST010002_422Refractive error4.000000e-14

EFO canonical traits (1, from GWAS)

EFO IDTrait name
EFO:0008336disease progression measurement

Drugs & pharmacology

Drug and pharmacology data

Is drug target: no

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

CTD chemical–gene interactions

36 total (human), top 30 by PubMed support.

ChemicalActions (top 5)PubMed papers
bisphenol Aincreases methylation, decreases expression, affects cotreatment2
sodium arseniteaffects expression, affects cotreatment, increases abundance, increases expression2
entinostatincreases expression, affects cotreatment2
Estradiolaffects expression, increases expression2
Valproic Acidincreases expression, affects expression2
aristolochic acid Iincreases expression1
beta-lapachoneincreases expression1
manganese chlorideaffects cotreatment, increases abundance, increases expression1
potassium chromate(VI)affects cotreatment, increases expression1
cupric oxideincreases expression1
epigallocatechin gallateaffects cotreatment, increases expression1
di-n-butylphosphoric acidaffects expression1
cylindrospermopsinincreases expression1
4-(5-benzo(1,3)dioxol-5-yl-4-pyridin-2-yl-1H-imidazol-2-yl)benzamideaffects cotreatment, increases expression1
belinostatincreases expression1
dorsomorphinaffects cotreatment, increases expression1
bisphenol Saffects cotreatment, decreases expression1
PCI 5002affects cotreatment, increases expression1
Resveratrolaffects cotreatment, increases expression1
Fulvestrantaffects cotreatment, increases methylation1
Vorinostatincreases expression1
Arsenicaffects cotreatment, increases abundance, increases expression1
Dexamethasoneaffects cotreatment, decreases expression1
Doxorubicindecreases expression1
Folic Aciddecreases expression1
Indomethacinaffects cotreatment, decreases expression1
Manganeseincreases abundance, increases expression, affects cotreatment1
Plant Extractsaffects cotreatment, increases expression1
Tobacco Smoke Pollutionincreases expression1
Zincaffects cotreatment, increases expression1

Clinical trials (associated diseases)

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

  • Disease cohort memberships (association, not causation — diseases whose associated-gene cohort lists this gene; a subset are also under Associated diseases): Huntington disease