20-32434963-G-A

Position:

• chr20-32434963-G-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_015338.6(ASXL1):​c.2251G>A​(p.Val751Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00379 in 1,614,054 control chromosomes in the GnomAD database, including 201 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V751F) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.021 (113 hom., cov: 32)
  • Exomes 𝑓: 0.0020 (88 hom.)
• Consequence: ASXL1 NM_015338.6 missense
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:4 O:1
• Conservation: PhyloP100: -1.10

Genes affected

ASXL1 (HGNC:18318): (ASXL transcriptional regulator 1) This gene is similar to the Drosophila additional sex combs gene, which encodes a chromatin-binding protein required for normal determination of segment identity in the developing embryo. The protein is a member of the Polycomb group of proteins, which are necessary for the maintenance of stable repression of homeotic and other loci. The protein is thought to disrupt chromatin in localized areas, enhancing transcription of certain genes while repressing the transcription of other genes. The protein encoded by this gene functions as a ligand-dependent co-activator for retinoic acid receptor in cooperation with nuclear receptor coactivator 1. Mutations in this gene are associated with myelodysplastic syndromes and chronic myelomonocytic leukemia. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2009]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.0016006231).
• BP6: Variant 20-32434963-G-A is Benign according to our data. Variant chr20-32434963-G-A is described in ClinVar as [Benign]. Clinvar id is 133593.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0716 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ASXL1	NM_015338.6	c.2251G>A	p.Val751Ile	missense_variant	13/13	ENST00000375687.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ASXL1	ENST00000375687.10	c.2251G>A	p.Val751Ile	missense_variant	13/13	5	NM_015338.6	P1

Frequencies

GnomAD3 genomes AF: 0.0210 AC: 3198 AN: 152092 Hom.: 113 Cov.: 32

Gnomad AFR AF: 0.0737

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00740

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000414

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000118

Gnomad OTH AF: 0.0129

GnomAD3 exomes AF: 0.00523 AC: 1314 AN: 251262 Hom.: 43 AF XY: 0.00378 AC XY: 514 AN XY: 135834

Gnomad AFR exome AF: 0.0735

Gnomad AMR exome AF: 0.00284

Gnomad ASJ exome AF: 0.0000992

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000163

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000616

Gnomad OTH exome AF: 0.00163

GnomAD4 exome AF: 0.00199 AC: 2909 AN: 1461844 Hom.: 88 Cov.: 30 AF XY: 0.00163 AC XY: 1189 AN XY: 727222

Gnomad4 AFR exome AF: 0.0724

Gnomad4 AMR exome AF: 0.00309

Gnomad4 ASJ exome AF: 0.0000383

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.000162

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000423

Gnomad4 OTH exome AF: 0.00454

GnomAD4 genome AF: 0.0211 AC: 3212 AN: 152210 Hom.: 113 Cov.: 32 AF XY: 0.0202 AC XY: 1506 AN XY: 74420

Gnomad4 AFR AF: 0.0738

Gnomad4 AMR AF: 0.00739

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000622

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000118

Gnomad4 OTH AF: 0.0128

Alfa AF: 0.00276 Hom.: 17

Bravo AF: 0.0238

ESP6500AA AF: 0.0685 AC: 302

ESP6500EA AF: 0.000233 AC: 2

ExAC AF: 0.00670 AC: 814

Asia WGS AF: 0.00404 AC: 15 AN: 3478

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Significance: Benign

Submissions summary: Benign:4 Other:1

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:3

Benign, criteria provided, single submitter	clinical testing	GeneDx	Sep 26, 2018	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Feb 01, 2024	- -
Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

Bohring-Opitz syndrome Benign:1

Benign, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Dec 05, 2021

- -

not specified Other:1

not provided, no classification provided

reference population

ITMI

Sep 19, 2013

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.073
BayesDel_addAF	Benign	-0.76	T
BayesDel_noAF	Benign	-0.80
CADD	Benign	0.0080
DANN	Benign	0.20
DEOGEN2	Benign	0.026	T;T;T;.;T
Eigen	Benign	-1.7
Eigen_PC	Benign	-1.8
FATHMM_MKL	Benign	0.080	N
LIST_S2	Benign	0.25	.;T;.;T;T
MetaRNN	Benign	0.0016	T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.45	N;N;N;.;.
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.24	T
PROVEAN	Benign	-0.090	N;.;.;.;N
REVEL	Benign	0.17
Sift	Benign	1.0	T;.;.;.;T
Sift4G	Benign	0.29	T;T;T;.;T
Polyphen		0.0	B;B;B;.;.
Vest4		0.037
MVP		0.11
MPC		0.049
ClinPred		0.0065	T
GERP RS		-9.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.042
gMVP		0.058

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: rs6058693; hg19: chr20-31022766;