3-136340604-G-A

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP2 PP3 PP5_Moderate

The NM_005862.3(STAG1):c.3559C>T(p.Arg1187Trp) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: STAG1 NM_005862.3 missense, splice_region
• Scores: Splicing: ADA: 0.9872
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 9.60

Genes affected

STAG1 (HGNC:11354): (STAG1 cohesin complex component) This gene is a member of the SCC3 family and is expressed in the nucleus. It encodes a component of cohesin, a multisubunit protein complex that provides sister chromatid cohesion along the length of a chromosome from DNA replication through prophase and prometaphase, after which it is dissociated in preparation for segregation during anaphase. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, STAG1
• PP3: Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. No scorers claiming Uncertain. Scorers claiming Benign: max_spliceai.
• PP5: Variant 3-136340604-G-A is Pathogenic according to our data. Variant chr3-136340604-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 987233.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr3-136340604-G-A is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
STAG1	NM_005862.3	c.3559C>T	p.Arg1187Trp	missense_variant, splice_region_variant	32/34	ENST00000383202.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
STAG1	ENST00000383202.7	c.3559C>T	p.Arg1187Trp	missense_variant, splice_region_variant	32/34	1	NM_005862.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 26

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Institute of Medical Genetics and Applied Genomics, University Hospital Tübingen

Oct 23, 2020

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.68
BayesDel_addAF	Pathogenic	0.26	D
BayesDel_noAF	Uncertain	0.13
Cadd	Pathogenic	35
Dann	Pathogenic	1.0
DEOGEN2	Benign	0.074	T;.;T
Eigen	Pathogenic	0.88
Eigen_PC	Pathogenic	0.90
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.98	D;T;D
M_CAP	Benign	0.020	T
MetaRNN	Benign	0.41	T;T;T
MetaSVM	Benign	-0.69	T
MutationAssessor	Benign	1.4	L;.;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.89	D
PROVEAN	Benign	-2.1	N;N;N
REVEL	Uncertain	0.40
Sift	Uncertain	0.0010	D;D;D
Sift4G	Uncertain	0.0070	D;D;D
Polyphen		1.0	D;.;.
Vest4		0.76
MutPred		0.51		Loss of disorder (P = 0.0013);.;.;
MVP		0.39
MPC		1.7
ClinPred		0.99	D
GERP RS		6.0
Varity_R		0.21
gMVP		0.43

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	0.99
dbscSNV1_RF	Pathogenic	0.88
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: rs1935927985; hg19: chr3-136059446;