NM_000044.6:c.88G>A

Variant names:

• chrX-67545234-G-A
• rs761416673
• NM_000044.6:c.88G>A

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_000044.6(AR):​c.88G>A​(p.Val30Met) variant causes a missense change. The variant allele was found at a frequency of 0.000000911 in 1,098,049 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 21)
  • Exomes 𝑓: 9.1e-7 (0 hom. 0 hem.)
• Consequence: AR NM_000044.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.20

Genes affected

AR (HGNC:644): (androgen receptor) The androgen receptor gene is more than 90 kb long and codes for a protein that has 3 major functional domains: the N-terminal domain, DNA-binding domain, and androgen-binding domain. The protein functions as a steroid-hormone activated transcription factor. Upon binding the hormone ligand, the receptor dissociates from accessory proteins, translocates into the nucleus, dimerizes, and then stimulates transcription of androgen responsive genes. This gene contains 2 polymorphic trinucleotide repeat segments that encode polyglutamine and polyglycine tracts in the N-terminal transactivation domain of its protein. Expansion of the polyglutamine tract from the normal 9-34 repeats to the pathogenic 38-62 repeats causes spinal bulbar muscular atrophy (SBMA, also known as Kennedy's disease). Mutations in this gene are also associated with complete androgen insensitivity (CAIS). Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jan 2017]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.851

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AR	NM_000044.6	c.88G>A	p.Val30Met	missense_variant	Exon 1 of 8	ENST00000374690.9	NP_000035.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AR	ENST00000374690.9	c.88G>A	p.Val30Met	missense_variant	Exon 1 of 8	1	NM_000044.6	ENSP00000363822.3

Frequencies

GnomAD3 genomes Cov.: 21

GnomAD4 exome AF: 9.11e-7 AC: 1 AN: 1098049 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 363417

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000119

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 21

ExAC AF: 0.00000824 AC: 1

EpiCase AF: 0.000109

EpiControl AF: 0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Jul 15, 2024

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: AR c.88G>A (p.Val30Met) results in a conservative amino acid change in the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The variant was absent in 181068 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.88G>A has been reported in the literature in at least one individual affected with complete androgen insensitivity syndrome (e.g., Topcu_2015).These data do not allow any conclusion about variant significance. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publication have been ascertained in the context of this evaluation (PMID: 26197461). No submitters have cited clinical-significance assessments for this variant to ClinVar. Based on the evidence outlined above, the variant was classified as uncertain significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.82
BayesDel_addAF	Pathogenic	0.26	D
BayesDel_noAF	Uncertain	0.13
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Benign	0.031	.;.;.;T;.
FATHMM_MKL	Uncertain	0.81	D
LIST_S2	Pathogenic	0.97	D;D;D;D;D
M_CAP	Pathogenic	0.92	D
MetaRNN	Pathogenic	0.85	D;D;D;D;D
MetaSVM	Pathogenic	0.98	D
MutationAssessor	Benign	2.0	.;M;M;.;.
PrimateAI	Pathogenic	0.84	D
PROVEAN	Benign	-1.4	N;N;N;.;.
REVEL	Pathogenic	0.71
Sift	Pathogenic	0.0	D;D;D;.;.
Sift4G	Uncertain	0.0020	D;D;D;T;T
Vest4		0.59
MutPred		0.65		Gain of disorder (P = 0.0606);Gain of disorder (P = 0.0606);Gain of disorder (P = 0.0606);Gain of disorder (P = 0.0606);Gain of disorder (P = 0.0606);
MVP		0.97
MPC		1.2
ClinPred		0.98	D
GERP RS		5.3
Varity_R		0.70
gMVP		0.74

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs761416673; hg19: chrX-66765076; COSMIC: COSV65952822;