APMAP

protein-coding

adipocyte plasma membrane associated protein

Gene summary

Enables arylesterase activity. Located in cell surface and membrane. [provided by Alliance of Genome Resources, Jul 2025]

Previous symbols:
  • C20orf3

MANE transcript

NM_020531.3

Inheritance

—

ClinVar variants

U:86

Top phenotype

—

gnomAD constraint

pLI —, LoF o/e 0.86

Max pathogenic AF

—

Genomic locus

chr20:24,962,925-24,992,751

External References & Databases

Transcript & Mutation Effects

hg38 • Region Span ~29.8 kb
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GenCC Phenotypes & Disease Associations

Curated gene-disease validity assertions and inheritance patterns

No GenCC data available for this gene.

ClinVar Associated Diseases & Phenotypes

Reported disease conditions connected to APMAP variants in ClinVar

1 Conditions Cataloged
not specifiedTotal: 79

ClinVar Variants & Pathogenicity by Type

Statistics based on transcript NM_020531.3. Only rare variants are included.

We include only reliable ClinVar variants with their consequences to MANE Select, MANE Plus Clinical transcripts, or transcripts with TSL equal to 1. Click a count to filter the variants table below.

Slight differences between displayed counts and ClinVar may occur due to a different transcript/consequence chosen by our variant effect predictor, or because we classify Benign/Likely benign as Likely benign and Pathogenic/Likely pathogenic as Likely pathogenic.

EffectPLPVUSLBBSum
synonymous
1
clinvar
1
missense
83
clinvar
83
nonsense
0
start loss
0
frameshift
1
clinvar
1
splice donor/acceptor (+/-2bp)
1
clinvar
1
Total00860086
Loading ClinVar variants...

Transcript Catalog

Annotated transcript isoforms across RefSeq and Ensembl databases

Showing 4 of 41 transcripts
Transcript IDSourceProtein IDCoding ExonsMANE Status
NM_020531.3RefSeqNP_065392.19MANE Select
ENST00000217456.3EnsemblENSP00000217456.29MANE Select
ENST00000451442.5EnsemblENSP00000395874.110Standard
ENST00000881535.1EnsemblENSP00000551594.18Standard

Gene Ontology (GO) Annotations & Pathways

Biological processes, molecular functions, cellular components and pathways

Biological Process

  • biological_process
  • biosynthetic process

Molecular Function

  • arylesterase activity
  • strictosidine synthase activity

Cellular Component

  • endoplasmic reticulum
  • cell surface
  • membrane
  • integral component of membrane

gnomAD Constraint

Source: gnomAD

Gene type
protein_coding
Transcript type
protein_coding
Transcript
ENST00000217456
Coding exons
9
Length
30055
Individuals with no LoFs
125693
Homozygous LoFs
0
Heterozygous LoFs
55
Defined
125748
p
0.000219
Z-ScoreObservedExpectedObserved/ExpectedMutation RateTotal Possible
Missense0.7752152490.8620.00001462689
Missense (PolyPhen)5759.240.96219599
Synonymous-0.08861051041.010.00000655865
Loss of Function0.5661719.70.8620.00000129193

Population LoF Frequency

PopulationCAFp-valueStatus
African0.000500.00049rare
Latino/Admixed American0.0000900.000087rare
Ashkenazi Jewish00.0absent
East Asian0.000350.00033rare
Finnish0.000140.00014rare
European (Non-Finnish)0.000190.00018rare
South Asian0.000470.00046rare
Other00.0absent

dbNSFP Gene Annotations

Source: dbNSFP

Function
FUNCTION: Exhibits strong arylesterase activity with beta-naphthyl acetate and phenyl acetate. May play a role in adipocyte differentiation. {ECO:0000269|PubMed:18513186}.;

Recessive Scores

pRec
0.105

Intolerance Scores

RVIS EVS
0.58
RVIS percentile EVS
82.3

Essentials

Essential (CRISPR)
N
Essential (CRISPR2)
N
Essential (gene trap)
N

Gene Damage Prediction

AllRecessiveDominant
MendelianMediumMediumMedium
Primary ImmunodeficiencyMediumMediumMedium
CancerMediumMediumMedium
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