rs587777278

Positions:

• chr2-218662894-T-A

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3 PP5

The NM_001079866.2(BCS1L):​c.901T>A​(p.Tyr301Asn) variant causes a missense change involving the alteration of a 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 Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: BCS1L NM_001079866.2 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 7.75

Genes affected

BCS1L (HGNC:1020): (BCS1 homolog, ubiquinol-cytochrome c reductase complex chaperone) This gene encodes a homolog of the S. cerevisiae bcs1 protein which is involved in the assembly of complex III of the mitochondrial respiratory chain. The encoded protein does not contain a mitochondrial targeting sequence but experimental studies confirm that it is imported into mitochondria. Mutations in this gene are associated with mitochondrial complex III deficiency and the GRACILE syndrome. Several alternatively spliced transcripts encoding two different isoforms have been described. [provided by RefSeq, Jan 2016]

BCS1L (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.803
• PP5: Variant 2-218662894-T-A is Pathogenic according to our data. Variant chr2-218662894-T-A is described in ClinVar as [Pathogenic]. Clinvar id is 126497.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
BCS1L	NM_001079866.2	c.901T>A	p.Tyr301Asn	missense_variant	7/8	ENST00000359273.8	NP_001073335.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
BCS1L	ENST00000359273.8	c.901T>A	p.Tyr301Asn	missense_variant	7/8	1	NM_001079866.2	ENSP00000352219.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Pili torti-deafness syndrome Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Dec 01, 2013

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.57
BayesDel_addAF	Pathogenic	0.42	D
BayesDel_noAF	Pathogenic	0.36
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.75	D;D;D;D;D;D;D
Eigen	Benign	-0.030
Eigen_PC	Benign	0.13
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.95	.;.;.;.;.;.;D
M_CAP	Pathogenic	0.36	D
MetaRNN	Pathogenic	0.80	D;D;D;D;D;D;D
MetaSVM	Uncertain	0.075	D
MutationAssessor	Benign	1.2	L;L;L;L;L;L;L
PrimateAI	Uncertain	0.74	T
PROVEAN	Pathogenic	-4.6	D;D;D;D;D;D;D
REVEL	Pathogenic	0.90
Sift	Uncertain	0.025	D;D;D;D;D;D;D
Sift4G	Uncertain	0.014	D;D;D;D;D;D;D
Polyphen		0.16	B;B;B;B;B;B;B
Vest4		0.87
MutPred		0.48		Gain of disorder (P = 0.0317);Gain of disorder (P = 0.0317);Gain of disorder (P = 0.0317);Gain of disorder (P = 0.0317);Gain of disorder (P = 0.0317);Gain of disorder (P = 0.0317);Gain of disorder (P = 0.0317);
MVP		0.96
MPC		2.0
ClinPred		0.99	D
GERP RS		4.9
Varity_R		0.49
gMVP		0.79

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

Publications

LitVar

Other links and lift over

dbSNP: rs587777278; hg19: chr2-219527617;