X-100664736-G-T

Variant names:

• chrX-100664736-G-T
• rs2022475
• NM_014467.3:c.356-38G>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_014467.3(SRPX2):​c.356-38G>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 0.0 (0 hom. 0 hem.)
  • Failed GnomAD Quality Control
• Consequence: SRPX2 NM_014467.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.07
• Publications: 6 publications found

Genes affected

SRPX2 (HGNC:30668): (sushi repeat containing protein X-linked 2) This gene encodes a secreted protein that contains three sushi repeat motifs. The encoded protein may play a role in the development of speech and language centers in the brain. This protein may also be involved in angiogenesis. Mutations in this gene are the cause of bilateral perisylvian polymicrogyria, rolandic epilepsy, speech dyspraxia and cognitive disability. [provided by RefSeq, May 2010]

SRPX2 Gene-Disease associations (from GenCC):

• rolandic epilepsy-speech dyspraxia syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• polymicrogyria, bilateral perisylvian, X-linked

  Inheritance: XL Classification: LIMITED Submitted by: G2P
• rolandic epilepsy, intellectual disability, and speech dyspraxia, X-linked

  Inheritance: XL Classification: LIMITED, NO_KNOWN Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.86).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SRPX2	NM_014467.3	c.356-38G>T		intron_variant	Intron 4 of 10	ENST00000373004.5	NP_055282.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SRPX2	ENST00000373004.5	c.356-38G>T		intron_variant	Intron 4 of 10	1	NM_014467.3	ENSP00000362095.3

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0 AN: 1066451 Hom.: 0 Cov.: 29 AF XY: 0.00 AC XY: 0 AN XY: 344385

African (AFR) AF: 0.00 AC: 0 AN: 25555

American (AMR) AF: 0.00 AC: 0 AN: 30965

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 18938

East Asian (EAS) AF: 0.00 AC: 0 AN: 28803

South Asian (SAS) AF: 0.00 AC: 0 AN: 50862

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 38486

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3799

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 824078

Other (OTH) AF: 0.00 AC: 0 AN: 44965

GnomAD4 genome Cov.: 23

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.86
CADD	Benign	5.1
DANN	Benign	0.50
PhyloP100		1.1

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs2022475; hg19: chrX-99919733;