chr9-99222364-A-G

Variant names:

• chr9-99222364-A-G
• rs752939739
• NM_006808.3:c.1A>G

Variant summary

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

The NM_006808.3(SEC61B):​c.1A>G​(p.Met1?) variant causes a start lost, splice region 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. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: SEC61B NM_006808.3 start_lost, splice_region
• Scores: Splicing: ADA: 0.01354
• Clinical Significance: Uncertain significance no assertion criteria provided U:1
• Conservation: PhyloP100: 3.22
• Publications: 0 publications found

Genes affected

SEC61B (HGNC:16993): (SEC61 translocon subunit beta) The Sec61 complex is the central component of the protein translocation apparatus of the endoplasmic reticulum (ER) membrane. Oligomers of the Sec61 complex form a transmembrane channel where proteins are translocated across and integrated into the ER membrane. This complex consists of three membrane proteins- alpha, beta, and gamma. This gene encodes the beta-subunit protein. The Sec61 subunits are also observed in the post-ER compartment, suggesting that these proteins can escape the ER and recycle back. There is evidence for multiple polyadenylated sites for this transcript. [provided by RefSeq, Jul 2008]

SEC61B Gene-Disease associations (from GenCC):

• polycystic liver disease 1

  Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
• SEC61B-related polycystic liver disease

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SEC61B	NM_006808.3	c.1A>G	p.Met1?	start_lost, splice_region_variant	Exon 1 of 4	ENST00000223641.5	NP_006799.1
SEC61B	XM_047422662.1	c.-1753A>G		upstream_gene_variant			XP_047278618.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SEC61B	ENST00000223641.5	c.1A>G	p.Met1?	start_lost, splice_region_variant	Exon 1 of 4	1	NM_006808.3	ENSP00000223641.4
SEC61B	ENST00000481573.1	n.50A>G		splice_region_variant, non_coding_transcript_exon_variant	Exon 1 of 2	2
SEC61B	ENST00000498603.5	c.-159-182A>G		intron_variant	Intron 1 of 3	3		ENSP00000474122.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: no assertion criteria provided

Submissions by phenotype

not provided Uncertain:1

Feb 21, 2018

OMIM

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: literature only

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.40	D
BayesDel_noAF	Pathogenic	0.34
CADD	Benign	21
DANN	Uncertain	0.98
DEOGEN2	Benign	0.10	T
Eigen	Uncertain	0.24
Eigen_PC	Benign	0.19
FATHMM_MKL	Uncertain	0.86	D
LIST_S2	Uncertain	0.90	D
M_CAP	Pathogenic	0.56	D
MetaRNN	Pathogenic	0.89	D
MetaSVM	Benign	-0.81	T
PhyloP100		3.2
PROVEAN	Benign	-2.1	N
REVEL	Uncertain	0.31
Sift	Uncertain	0.011	D
Sift4G	Pathogenic	0.0	D
Polyphen		0.0	B
Vest4		0.94
MutPred		0.62		Loss of glycosylation at P2 (P = 0.0772);
MVP		0.83
ClinPred		0.95	D
GERP RS		4.6
PromoterAI		-0.29	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.77
gMVP		0.41
Mutation Taster		=9/191	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.014
dbscSNV1_RF	Benign	0.18
SpliceAI score (max)		0.11		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: rs752939739; hg19: chr9-101984646;