rs1555907620

Variant names:

• chrX-11772246-C-T
• rs1555907620
• NM_078629.4:c.1372C>T

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_078629.4(MSL3):​c.1372C>T​(p.Arg458*) variant causes a stop gained change involving the alteration of a non-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 Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 23)
• Consequence: MSL3 NM_078629.4 stop_gained
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 1.64
• Publications: 1 publications found

Genes affected

MSL3 (HGNC:7370): (MSL complex subunit 3) This gene encodes a nuclear protein that is similar to the product of the Drosophila male-specific lethal-3 gene. The Drosophila protein plays a critical role in a dosage-compensation pathway, which equalizes X-linked gene expression in males and females. Thus, the human protein is thought to play a similar function in chromatin remodeling and transcriptional regulation, and it has been found as part of a complex that is responsible for histone H4 lysine-16 acetylation. This gene can undergo X inactivation. Alternative splicing results in multiple transcript variants. Related pseudogenes have been identified on chromosomes 2, 7 and 8. [provided by RefSeq, Jul 2010]

MSL3 Gene-Disease associations (from GenCC):

• Basilicata-Akhtar syndrome

  Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, Ambry Genetics, G2P

ACMG classification

Our verdict: Pathogenic. The variant received 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-11772246-C-T is Pathogenic according to our data. Variant chrX-11772246-C-T is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 487568.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_078629.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MSL3	NM_078629.4	MANE Select	c.1372C>T	p.Arg458*	stop_gained	Exon 11 of 13	NP_523353.2
	MSL3	NM_001193270.2		c.1336C>T	p.Arg446*	stop_gained	Exon 11 of 13	NP_001180199.1
	MSL3	NM_001282174.1		c.925C>T	p.Arg309*	stop_gained	Exon 10 of 12	NP_001269103.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MSL3	ENST00000312196.10	TSL:1 MANE Select	c.1372C>T	p.Arg458*	stop_gained	Exon 11 of 13	ENSP00000312244.4
	MSL3	ENST00000647869.1		c.1369C>T	p.Arg457*	stop_gained	Exon 11 of 13	ENSP00000497615.1
	MSL3	ENST00000398527.7	TSL:2	c.1336C>T	p.Arg446*	stop_gained	Exon 11 of 13	ENSP00000381538.2

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 27

GnomAD4 genome Cov.: 23

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic/Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
1	-	-	Basilicata-Akhtar syndrome (1)
1	-	-	Intellectual disability (1)
1	-	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.56	D
BayesDel_noAF	Pathogenic	0.57
CADD	Pathogenic	34
DANN	Uncertain	0.99
FATHMM_MKL	Uncertain	0.89	D
PhyloP100		1.6
Vest4		0.94
GERP RS		1.3
Mutation Taster		=4/196	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs1555907620; hg19: chrX-11790365;