1-155338235-G-A

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 3P and 4B. PM2 PP2 BP4_Strong

The NM_018489.3(ASH1L):c.8657C>T(p.Ala2886Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000658 in 151,896 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
• Consequence: ASH1L NM_018489.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.386

Genes affected

ASH1L (HGNC:19088): (ASH1 like histone lysine methyltransferase) This gene encodes a member of the trithorax group of transcriptional activators. The protein contains four AT hooks, a SET domain, a PHD-finger motif, and a bromodomain. It is localized to many small speckles in the nucleus, and also to cell-cell tight junctions. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_benign. Variant got -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, ASH1L
• BP4: Computational evidence support a benign effect (MetaRNN=0.06797519).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ASH1L	NM_018489.3	c.8657C>T	p.Ala2886Val	missense_variant	27/28	ENST00000392403.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ASH1L	ENST00000392403.8	c.8657C>T	p.Ala2886Val	missense_variant	27/28	5	NM_018489.3	P4

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 151896 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 31

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 151896 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74172

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 06, 2022

The c.8657C>T (p.A2886V) alteration is located in exon 27 (coding exon 26) of the ASH1L gene. This alteration results from a C to T substitution at nucleotide position 8657, causing the alanine (A) at amino acid position 2886 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.076
BayesDel_addAF	Benign	-0.17	T
BayesDel_noAF	Benign	-0.48
Cadd	Benign	9.3
Dann	Uncertain	0.99
DEOGEN2	Benign	0.021	T;.
Eigen	Benign	-0.83
Eigen_PC	Benign	-0.76
FATHMM_MKL	Benign	0.19	N
LIST_S2	Benign	0.66	T;T
M_CAP	Benign	0.041	D
MetaRNN	Benign	0.068	T;T
MetaSVM	Benign	-0.89	T
MutationAssessor	Benign	1.1	L;.
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.34	T
PROVEAN	Benign	-0.57	N;N
REVEL	Benign	0.17
Sift	Benign	0.075	T;T
Sift4G	Benign	0.20	T;T
Polyphen		0.019	B;B
Vest4		0.032
MutPred		0.091		Gain of glycosylation at T2890 (P = 0.1319);.;
MVP		0.35
MPC		0.75
ClinPred		0.054	T
GERP RS		2.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.019
gMVP		0.37

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: rs1390908329; hg19: chr1-155308026;