ACTR3B

gene
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Also known as ARP11ARP3beta

Summary

ACTR3B (actin related protein 3B, HGNC:17256) is a protein-coding gene on chromosome 7q36.1-q36.2, encoding Actin-related protein 3B (Q9P1U1). Plays a role in the organization of the actin cytoskeleton.

This gene encodes a member of the actin-related proteins (ARP), which form multiprotein complexes and share 35-55% amino acid identity with conventional actin. The protein encoded by this gene may have a regulatory role in the actin cytoskeleton and induce cell-shape change and motility. Pseudogenes of this gene are located on chromosomes 2, 4, 10, 16, 22 and Y. Alternative splicing results in multiple transcript variants and protein isoforms.

Source: NCBI Gene 57180 — RefSeq curated summary.

At a glance

  • GWAS associations: 8
  • Clinical variants (ClinVar): 58 total — 7 pathogenic, 1 likely-pathogenic
  • MANE Select transcript: NM_020445

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:17256
Approved symbolACTR3B
Nameactin related protein 3B
Location7q36.1-q36.2
Locus typegene with protein product
StatusApproved
AliasesARP11, ARP3beta
Ensembl geneENSG00000133627
Ensembl biotypeprotein_coding
Entrez57180

Gene structure

Transcript identifiers

Ensembl transcripts: 13 — 11 protein_coding, 1 retained_intron, 1 protein_coding_CDS_not_defined

ENST00000256001, ENST00000377776, ENST00000397282, ENST00000479402, ENST00000488782, ENST00000885354, ENST00000885355, ENST00000885356, ENST00000885357, ENST00000919241, ENST00000919242, ENST00000919243, ENST00000965408

RefSeq mRNA: 9 — MANE Select: NM_020445 NM_001040135, NM_001350940, NM_001350941, NM_001350942, NM_001350943, NM_001350944, NM_001350945, NM_001350946, NM_020445

CCDS: CCDS34782, CCDS5934, CCDS87568

Canonical transcript exons

ENST00000256001 — 12 exons

ExonStartEnd
ENSE00000827618152854458152855378
ENSE00003432239152816481152816588
ENSE00003462962152825030152825122
ENSE00003470665152852126152852251
ENSE00003477818152814550152814645
ENSE00003501039152801621152801731
ENSE00003537700152783187152783242
ENSE00003543124152853494152853577
ENSE00003602821152800531152800655
ENSE00003605728152823342152823515
ENSE00003632132152820299152820442
ENSE00003850575152759752152759926

Expression profiles

Bgee: expression breadth ubiquitous, 232 present calls, max score 96.23.

FANTOM5 (CAGE): breadth ubiquitous, TPM avg 15.6918 / max 187.1984, expressed in 1777 samples.

FANTOM5 promoters (4 alternative TSS)

Promoter IDTPM avgSamples expressed
8214514.58871766
821440.7596447
821460.2671122
821470.076433

Top tissues by expression

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

TissueAnatomy IDExpression scoreQuality
cortical plateUBERON:000534396.23gold quality
nucleus accumbensUBERON:000188293.87gold quality
secondary oocyteCL:000065593.17gold quality
ventricular zoneUBERON:000305392.66gold quality
parotid glandUBERON:000183192.59gold quality
prefrontal cortexUBERON:000045192.50gold quality
caudate nucleusUBERON:000187391.90gold quality
dorsolateral prefrontal cortexUBERON:000983491.87gold quality
putamenUBERON:000187491.30gold quality
neocortexUBERON:000195091.03gold quality
frontal cortexUBERON:000187090.99gold quality
anterior cingulate cortexUBERON:000983590.96gold quality
cingulate cortexUBERON:000302790.90gold quality
Brodmann (1909) area 9UBERON:001354090.74gold quality
telencephalonUBERON:000189390.62gold quality
right frontal lobeUBERON:000281090.60gold quality
cerebral cortexUBERON:000095690.55gold quality
Brodmann (1909) area 23UBERON:001355490.04gold quality
forebrainUBERON:000189089.55gold quality
Ammon’s hornUBERON:000195489.52gold quality
primary visual cortexUBERON:000243689.42gold quality
amygdalaUBERON:000187688.93gold quality
occipital lobeUBERON:000202188.77gold quality
middle temporal gyrusUBERON:000277188.70gold quality
ganglionic eminenceUBERON:000402388.58gold quality
brainUBERON:000095588.50gold quality
temporal lobeUBERON:000187188.07gold quality
primordial germ cell in gonadCL:0000670 ∩ UBERON:000099186.99gold quality
superior frontal gyrusUBERON:000266186.97gold quality
orbitofrontal cortexUBERON:000416786.42gold quality

Single-cell (SCXA)

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

ExperimentMarker?Max mean expression
E-GEOD-75140yes215.53
E-ANND-3yes5.25

Regulation

Is transcription factor: no

miRNA regulators (miRDB)

45 targeting ACTR3B, 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-3613-3P100.0076.367965
HSA-MIR-520D-5P99.9873.344883
HSA-MIR-524-5P99.9873.434882
HSA-MIR-548AJ-3P99.9673.385345
HSA-MIR-548X-3P99.9673.385345
HSA-MIR-1250-3P99.9670.044038
HSA-MIR-548J-3P99.9472.614881
HSA-MIR-548AE-3P99.9372.664867
HSA-MIR-548AQ-3P99.9372.664867
HSA-MIR-548AH-3P99.9372.544872
HSA-MIR-548AM-3P99.9372.544872
HSA-MIR-311999.9271.342390
HSA-MIR-589-3P99.9169.622088
HSA-MIR-469899.8471.414303
HSA-MIR-76599.8468.242442
HSA-MIR-576-5P99.8470.462582
HSA-MIR-11181-3P99.7566.382205
HSA-MIR-425599.7267.701541
HSA-MIR-4699-3P99.7170.153142
HSA-MIR-6779-5P99.7065.762363
HSA-MIR-1212499.6869.172700
HSA-MIR-452-5P99.6569.631762
HSA-MIR-4676-3P99.6569.311733
HSA-MIR-892C-3P99.6569.381745
HSA-MIR-5004-3P99.5468.271371
HSA-MIR-7106-5P99.5367.473574
HSA-MIR-5571-5P99.4966.991764
HSA-MIR-142-5P99.4870.922416
HSA-MIR-5590-3P99.4870.912429
HSA-MIR-4666A-5P99.4169.721887

Literature-anchored findings (GeneRIF, showing 1)

  • Thus, overexpression of Arp11 may suppress tumorigenicity in nude mice. (PMID:14651955)

Cross-species orthologs

3 orthologs

OrganismSymbolGene ID
danio_rerioactr3bENSDARG00000008790
mus_musculusActr3bENSMUSG00000056367
rattus_norvegicusActr3bENSRNOG00000031855

Paralogs (26): ACTR6 (ENSG00000075089), ACTB (ENSG00000075624), ACTL6B (ENSG00000077080), ACTR5 (ENSG00000101442), ACTR3C (ENSG00000106526), ACTA2 (ENSG00000107796), ACTR8 (ENSG00000113812), ACTR1B (ENSG00000115073), ACTR3 (ENSG00000115091), ACTL8 (ENSG00000117148), ACTRT1 (ENSG00000123165), ACTR10 (ENSG00000131966), ACTL6A (ENSG00000136518), ACTR2 (ENSG00000138071), ACTR1A (ENSG00000138107), ACTA1 (ENSG00000143632), ACTL7B (ENSG00000148156), ACTC1 (ENSG00000159251), ACTG2 (ENSG00000163017), ACTBL2 (ENSG00000169067), ACTRT2 (ENSG00000169717), ACTL9 (ENSG00000181786), ACTG1 (ENSG00000184009), ACTRT3 (ENSG00000184378), ACTL7A (ENSG00000187003), ACTL10 (ENSG00000288649)

Protein

Protein identifiers

Actin-related protein 3BQ9P1U1 (reviewed: Q9P1U1)

Alternative names: ARP3-beta, Actin-like protein 3B, Actin-related protein ARP4

All UniProt accessions (1): Q9P1U1

UniProt curated annotations — full annotation on UniProt →

Function. Plays a role in the organization of the actin cytoskeleton. May function as ATP-binding component of the Arp2/3 complex which is involved in regulation of actin polymerization and together with an activating nucleation-promoting factor (NPF) mediates the formation of branched actin networks. May decrease the metastatic potential of tumors.

Subunit / interactions. Interacts with the Arp2/3 complex composed of ARP2, ARP3, ARPC1B, ARPC1B/p41-ARC, ARPC2/p34-ARC, ARPC3/p21-ARC, ARPC4/p20-ARC and ARPC5/p16-ARC.

Subcellular location. Cytoplasm. Cytoskeleton. Cell projection.

Tissue specificity. Detected in fetal brain. Detected throughout the adult brain, in neurons from gray matter, but not in white matter. Detected in liver, skeletal muscle and pancreas. Detected in lung adenocarcinoma cells with low metastatic potential, but not in lung adenocarcinoma cells with high metastatic potential.

Similarity. Belongs to the actin family. ARP3 subfamily.

Isoforms (3)

UniProt IDNamesCanonical?
Q9P1U1-11yes
Q9P1U1-22
Q9P1U1-33

RefSeq proteins (9): NP_001035225, NP_001337869, NP_001337870, NP_001337871, NP_001337872, NP_001337873, NP_001337874, NP_001337875, NP_065178* (*=MANE)

Domains & families (InterPro)

IDNameType
IPR004000ActinFamily
IPR020902Actin/actin-like_CSConserved_site
IPR043129ATPase_NBDHomologous_superfamily

Pfam: PF00022

UniProt features (4 total): splice variant 2, chain 1, sequence variant 1

Structure

Experimental structures (PDB)

0 structures.

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-Q9P1U1-F193.400.90

Function

Pathways and Gene Ontology

Reactome pathways

0 pathways

MSigDB gene sets: 121 (showing top): MCLACHLAN_DENTAL_CARIES_DN, GOBP_ACTIN_FILAMENT_ORGANIZATION, GOMF_ACTIN_BINDING, ZHANG_BREAST_CANCER_PROGENITORS_UP, GOBP_ARP2_3_COMPLEX_MEDIATED_ACTIN_NUCLEATION, GOBP_ACTIN_NUCLEATION, MODULE_207, GOCC_LAMELLIPODIUM, GOCC_ARP2_3_PROTEIN_COMPLEX, GAVIN_FOXP3_TARGETS_CLUSTER_P3, BLALOCK_ALZHEIMERS_DISEASE_DN, GOCC_CELL_LEADING_EDGE, GOMF_CYTOSKELETAL_PROTEIN_BINDING, GOMF_ADENYL_NUCLEOTIDE_BINDING, WONG_ADULT_TISSUE_STEM_MODULE

GO Biological Process (0):

GO Molecular Function (4): actin binding (GO:0003779), ATP binding (GO:0005524), nucleotide binding (GO:0000166), actin filament binding (GO:0051015)

GO Cellular Component (5): cytoskeleton (GO:0005856), lamellipodium (GO:0030027), extracellular exosome (GO:0070062), cytoplasm (GO:0005737), cell projection (GO:0042995)

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
cellular anatomical structure2
cytoskeletal protein binding1
adenyl ribonucleotide binding1
purine ribonucleoside triphosphate binding1
nucleoside phosphate binding1
heterocyclic compound binding1
actin binding1
protein-containing complex binding1
intracellular membraneless organelle1
cell leading edge1
plasma membrane bounded cell projection1
extracellular vesicle1
intracellular anatomical structure1

Protein interactions and networks

STRING

2189 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
ACTR3BACTR2P61160976
ACTR3BDCTN2Q13561907
ACTR3BTPPPO94811844
ACTR3BDCTN5Q9BTE1838
ACTR3BCAPZA2P47755810
ACTR3BCAPZA1P52907798
ACTR3BDCTN1Q14203794
ACTR3BDCTN6O00399791
ACTR3BDCTN4Q9UJW0767
ACTR3BARPC5O15511737
ACTR3BARPC5LQ9BPX5732
ACTR3BARPC2O15144727
ACTR3BARPC3O15145691
ACTR3BACTBP02570675
ACTR3BWASP42768589

IntAct

57 interactions, top by confidence:

ABTypeScore
ARPC1BARPC2psi-mi:“MI:0914”(association)0.920
ARPC4ARPC1Bpsi-mi:“MI:0914”(association)0.910
ARPC1AARPC2psi-mi:“MI:0914”(association)0.900
ARPC5ARPC1Bpsi-mi:“MI:0914”(association)0.890
SEPTIN9SEPTIN6psi-mi:“MI:0914”(association)0.800
ARPC5ARPC3psi-mi:“MI:0914”(association)0.730
CFTRESYT2psi-mi:“MI:0914”(association)0.710
ENO1ENO2psi-mi:“MI:0914”(association)0.710
ACTR3BARPC2psi-mi:“MI:0914”(association)0.670
ARPC3ARPC2psi-mi:“MI:0914”(association)0.640
STK4STRNpsi-mi:“MI:0914”(association)0.610
ACTR3BEXOC5psi-mi:“MI:0915”(physical association)0.370
Xpo1IFT56psi-mi:“MI:0914”(association)0.350
ACTR2psi-mi:“MI:0914”(association)0.350
ARPC2psi-mi:“MI:0914”(association)0.350
ARPC3psi-mi:“MI:0914”(association)0.350
CALD1psi-mi:“MI:0914”(association)0.350
CAPZBENAHpsi-mi:“MI:0914”(association)0.350
ACTR3BSBNO1psi-mi:“MI:0914”(association)0.350
PAATHIP1psi-mi:“MI:0914”(association)0.350
FAM133ADNM1Lpsi-mi:“MI:0914”(association)0.350
NCKIPSDGAS7psi-mi:“MI:0914”(association)0.350
NDPMYCBP2psi-mi:“MI:0914”(association)0.350
TUBD1FLOT1psi-mi:“MI:0914”(association)0.350
MSCTCF3psi-mi:“MI:0914”(association)0.350
TFAP4PRKCApsi-mi:“MI:0914”(association)0.350
SLC25A41TMOD1psi-mi:“MI:0914”(association)0.350
ACADLRAP1Bpsi-mi:“MI:0914”(association)0.350

BioGRID (128): ACTR3B (Affinity Capture-MS), ACTR3B (Affinity Capture-MS), ACTR3B (Affinity Capture-MS), ACTR3B (Co-fractionation), ACTR3B (Affinity Capture-MS), ACTR3B (Affinity Capture-MS), ACTR3B (Affinity Capture-MS), ACTR3B (Affinity Capture-MS), ACTR3B (Affinity Capture-MS), ACTR2 (Affinity Capture-MS), ACTR3B (Affinity Capture-MS), ARPC2 (Affinity Capture-MS), CHURC1 (Affinity Capture-MS), OSBPL3 (Affinity Capture-MS), ACTR3 (Affinity Capture-MS)

ESM2 similar proteins: A0A1L8EV45, C9WPN6, F1QGW6, F6RQL9, O73723, O77676, P00516, P0C605, P20461, P23258, P23330, P31321, P32392, P35250, P41091, P53033, P61157, P61158, P62482, P62483, P81795, P83887, P83888, Q05B83, Q0VCD2, Q13126, Q13303, Q13976, Q27955, Q2KHU8, Q2KJ81, Q2VIR3, Q32KM1, Q4V7C7, Q5R797, Q5R8R1, Q5ZHS1, Q5ZMS3, Q641P0, Q641W4

Diamond homologs: A0A1L8EV45, A2BDB0, A2X6S3, O16808, O17320, O18840, O73723, P02576, P02578, P04752, P04829, P07829, P0DM41, P0DM42, P10984, P10986, P10988, P10990, P12716, P13363, P17126, P17128, P22132, P26183, P27131, P30162, P30163, P32390, P32392, P35432, P41112, P41339, P42528, P43239, P45886, P47117, P53458, P53461, P53468, P53470

SIGNOR signaling

0 interactions.

Enriched among interaction partners

Reactome pathways and GO biological processes over-represented among this gene’s 57 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
RHO GTPases Activate WASPs and WAVEs977.2×4e-13
Parasite infection874.8×9e-12
Leishmania phagocytosis874.8×9e-12
Fcgamma receptor (FCGR) dependent phagocytosis860.2×3e-11
EPHB-mediated forward signaling857.4×4e-11
FCGR3A-mediated phagocytosis945.5×2e-11
Regulation of actin dynamics for phagocytic cup formation944.8×2e-11
Leishmania infection835.3×2e-09

GO biological processes:

GO termPartnersFoldFDR
Arp2/3 complex-mediated actin nucleation8165.2×2e-14

Disease & clinical

Clinical variants and AI predictions

ClinVar

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

ClassificationCount (floor)
Pathogenic7
Likely pathogenic1
Uncertain significance34
Likely benign3
Benign0

Top pathogenic / likely-pathogenic (8)

Variant IDHGVSClassification
147806GRCh38/hg38 7q36.2-36.3(chr7:152807205-159325876)x1Pathogenic
150933GRCh38/hg38 7q36.1-36.3(chr7:152428852-159335865)x3Pathogenic
1808403GRCh37/hg19 7q36.1-36.2(chr7:151581341-153599029)x1Pathogenic
3236546GRCh37/hg19 7q36.1-36.2(chr7:151935482-154215665)x1Pathogenic
442820GRCh37/hg19 7q36.1-36.3(chr7:151566053-159119707)x3Pathogenic
443708GRCh37/hg19 7q36.1-36.3(chr7:151167135-159119707)x1Pathogenic
60314GRCh38/hg38 7q36.1-36.3(chr7:152332476-159296617)x1Pathogenic
443611GRCh37/hg19 7q36.1-36.2(chr7:151387196-154070094)x1Likely pathogenic

SpliceAI

3797 predictions. Top by Δscore:

VariantEffectΔscore
7:152801618:CA:Cacceptor_loss1.0000
7:152801619:A:AGacceptor_gain1.0000
7:152801619:AGT:Aacceptor_gain1.0000
7:152801619:AGTG:Aacceptor_gain1.0000
7:152801620:G:GAacceptor_gain1.0000
7:152801620:GT:Gacceptor_gain1.0000
7:152801620:GTG:Gacceptor_gain1.0000
7:152801620:GTGG:Gacceptor_gain1.0000
7:152801620:GTGGC:Gacceptor_gain1.0000
7:152801727:TAATG:Tdonor_gain1.0000
7:152801729:ATG:Adonor_gain1.0000
7:152801730:TG:Tdonor_gain1.0000
7:152801731:GG:Gdonor_gain1.0000
7:152801732:G:GGdonor_gain1.0000
7:152801732:GT:Gdonor_loss1.0000
7:152801733:T:Adonor_loss1.0000
7:152814549:GACA:Gacceptor_gain1.0000
7:152819347:ACTTG:Aacceptor_gain1.0000
7:152819350:T:TAacceptor_gain1.0000
7:152823513:G:GTdonor_gain1.0000
7:152823514:AGG:Adonor_loss1.0000
7:152823516:G:GAdonor_loss1.0000
7:152823517:T:Gdonor_loss1.0000
7:152825011:ATATT:Aacceptor_gain1.0000
7:152825012:T:Gacceptor_gain1.0000
7:152825013:A:AGacceptor_gain1.0000
7:152825013:ATT:Aacceptor_gain1.0000
7:152825014:T:Gacceptor_gain1.0000
7:152825015:T:Aacceptor_gain1.0000
7:152825019:A:AGacceptor_gain1.0000

AlphaMissense

2750 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
7:152759923:C:TT14I1.000
7:152783196:G:CK18N1.000
7:152783196:G:TK18N1.000
7:152783222:C:AP27H1.000
7:152800618:G:AG63E1.000
7:152801637:G:AG81E1.000
7:152801651:T:AW86R1.000
7:152801651:T:CW86R1.000
7:152814582:A:CR123S1.000
7:152814582:A:TR123S1.000
7:152816541:G:TG165W1.000
7:152816542:G:AG165E1.000
7:152816556:A:CS170R1.000
7:152816558:C:AS170R1.000
7:152816558:C:GS170R1.000
7:152816560:G:AG171E1.000
7:152816560:G:TG171V1.000
7:152852142:G:AG323E1.000
7:152852142:G:TG323V1.000
7:152853548:T:AW378R1.000
7:152853548:T:CW378R1.000
7:152853555:G:AG380E1.000
7:152853558:G:AG381D1.000
7:152759913:G:CD11H0.999
7:152759919:G:CG13R0.999
7:152759919:G:TG13C0.999
7:152759920:G:AG13D0.999
7:152759920:G:TG13V0.999
7:152759926:G:AG15E0.999
7:152783194:A:GK18E0.999

dbSNP variants (sampled 300 via entrez): RS1000059767 (7:152797709 G>A), RS1000075994 (7:152789475 G>A), RS1000135654 (7:152810857 T>C), RS1000163740 (7:152834432 G>A), RS1000273946 (7:152781272 A>G,T), RS1000293394 (7:152781493 A>G,T), RS1000326392 (7:152829161 C>T), RS1000381615 (7:152774664 T>C,G), RS1000451963 (7:152822725 G>T), RS1000501394 (7:152775113 G>A), RS1000511896 (7:152842782 C>G,T), RS1000574185 (7:152847926 G>A,C), RS1000580593 (7:152790064 C>A,T), RS1000646620 (7:152768642 A>G), RS1000667606 (7:152817314 G>A)

Disease associations

OMIM: gene `` | disease phenotypes:

GenCC curated gene-disease

Mondo (0):

Orphanet (0):

HPO phenotypes

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

GWAS associations

8 associations (top):

StudyTraitp-value
GCST001762_195Obesity-related traits9.000000e-06
GCST002548_5Ulcerative colitis5.000000e-07
GCST003657_2Attention deficit hyperactivity disorder symptom score2.000000e-06
GCST004251_8Paneth cell defects in Crohn’s disease4.000000e-06
GCST004640_7Western dietary pattern2.000000e-06
GCST006446_6Ulna and radius bone mineral density7.000000e-06
GCST008154_4Trunk fat mass2.000000e-07
GCST008157_36Body fat mass1.000000e-07

EFO canonical traits (5, from GWAS)

EFO IDTrait name
EFO:0004338body weight
EFO:0007860ADHD symptom measurement
EFO:0007963abnormal paneth cell measurement
EFO:0008111diet measurement
EFO:0007933radius bone mineral density

Drugs & pharmacology

Drug and pharmacology data

Is drug target: no

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

CTD chemical–gene interactions

23 total (human), top 23 by PubMed support.

ChemicalActions (top 5)PubMed papers
sodium arsenitedecreases expression, increases abundance, increases expression2
Tetrachlorodibenzodioxindecreases expression2
triphenyl phosphateaffects expression1
bisphenol Aaffects cotreatment, increases methylation, decreases methylation1
tris(1,3-dichloro-2-propyl)phosphatedecreases expression1
cobaltous chloridedecreases expression1
cupric oxidedecreases expression1
di-n-butylphosphoric acidaffects expression1
CGP 52608increases reaction, affects binding1
Fulvestrantaffects cotreatment, increases methylation1
Amiodaroneincreases expression1
Arsenicincreases abundance, increases expression1
Benzo(a)pyreneaffects methylation1
Estradiolincreases expression1
Ethyl Methanesulfonatedecreases expression1
Methyl Methanesulfonatedecreases expression1
Thiramdecreases expression1
Valproic Aciddecreases methylation1
Cyclosporinedecreases expression1
Aflatoxin B1increases methylation1
Copper Sulfatedecreases expression1
tert-Butylhydroperoxidedecreases expression1
Vitamin K 3affects 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.