chrX-55021095-A-G

Position:

• chrX-55021095-A-G

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM2 PP3_Strong PP5

The NM_000032.5(ALAS2):​c.595T>C​(p.Tyr199His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 23)
• Consequence: ALAS2 NM_000032.5 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 9.32

Genes affected

ALAS2 (HGNC:397): (5'-aminolevulinate synthase 2) The product of this gene specifies an erythroid-specific mitochondrially located enzyme. The encoded protein catalyzes the first step in the heme biosynthetic pathway. Defects in this gene cause X-linked pyridoxine-responsive sideroblastic anemia. Alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.99
• PP5: Variant X-55021095-A-G is Pathogenic according to our data. Variant chrX-55021095-A-G is described in ClinVar as [Pathogenic]. Clinvar id is 10484.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ALAS2	NM_000032.5	c.595T>C	p.Tyr199His	missense_variant	5/11	ENST00000650242.1
ALAS2	NM_001037968.4	c.556T>C	p.Tyr186His	missense_variant	5/11
ALAS2	NM_001037967.4	c.484T>C	p.Tyr162His	missense_variant	4/10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ALAS2	ENST00000650242.1	c.595T>C	p.Tyr199His	missense_variant	5/11		NM_000032.5	P1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 23

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

X-linked sideroblastic anemia 1 Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Mar 01, 1999

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.66	D
BayesDel_noAF	Pathogenic	0.70
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.98	.;D;D;.;.;.
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.93	D;.;D;D;D;D
M_CAP	Pathogenic	0.86	D
MetaRNN	Pathogenic	0.99	D;D;D;D;D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	4.3	.;H;H;.;.;.
MutationTaster	Benign	1.0	A;A;A
PrimateAI	Pathogenic	0.82	D
PROVEAN	Pathogenic	-4.9	D;.;D;D;.;D
REVEL	Pathogenic	0.96
Sift	Pathogenic	0.0	D;.;D;D;.;D
Sift4G	Pathogenic	0.0	D;.;D;D;.;.
Polyphen		1.0	.;D;D;.;.;.
Vest4		0.94
MutPred		0.95		.;Gain of disorder (P = 0.0203);Gain of disorder (P = 0.0203);.;.;.;
MVP		1.0
MPC		1.6
ClinPred		1.0	D
GERP RS		4.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.97
gMVP		1.0

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: rs137852310; hg19: chrX-55047528;