rs17851822

Variant names:

• chrX-100666831-A-T
• rs17851822
• NM_014467.3:c.859A>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_014467.3(SRPX2):​c.859A>T​(p.Thr287Ser) variant causes a missense 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. 16/21 in silico tools predict 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)
• Consequence: SRPX2 NM_014467.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.31
• Publications: 2 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: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.22380927).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_014467.3. 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
	SRPX2	NM_014467.3	MANE Select	c.859A>T	p.Thr287Ser	missense	Exon 8 of 11	NP_055282.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SRPX2	ENST00000373004.5	TSL:1 MANE Select	c.859A>T	p.Thr287Ser	missense	Exon 8 of 11	ENSP00000362095.3
	SRPX2	ENST00000638458.1	TSL:5	c.883A>T	p.Thr295Ser	missense	Exon 7 of 7	ENSP00000492168.1
	SRPX2	ENST00000638920.1	TSL:5	n.862A>T		non_coding_transcript_exon	Exon 7 of 10

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 23

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.098
BayesDel_addAF	Benign	-0.29	T
BayesDel_noAF	Benign	-0.65
CADD	Benign	20
DANN	Benign	0.93
DEOGEN2	Benign	0.054	T
FATHMM_MKL	Uncertain	0.86	D
LIST_S2	Benign	0.80	T
M_CAP	Benign	0.021	T
MetaRNN	Benign	0.22	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.1	L
PhyloP100		3.3
PrimateAI	Benign	0.36	T
PROVEAN	Benign	-1.9	N
REVEL	Benign	0.050
Sift	Benign	0.068	T
Sift4G	Benign	0.12	T
Polyphen		0.0020	B
Vest4		0.31
MutPred		0.26		Loss of glycosylation at T287 (P = 0.0402)
MVP		0.36
MPC		0.24
ClinPred		0.26	T
GERP RS		1.9
PromoterAI		-0.0072	Neutral
Varity_R		0.13
gMVP		0.29
Mutation Taster		=91/9	polymorphism

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: rs17851822; hg19: chrX-99921828;