NM_018366.3:c.329C>G

Variant names:

• chr4-6716538-C-G
• rs772738241
• NM_018366.3:c.329C>G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_018366.3(BLOC1S4):​c.329C>G​(p.Ser110Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S110L) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: BLOC1S4 NM_018366.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.29

Genes affected

BLOC1S4 (HGNC:24206): (biogenesis of lysosomal organelles complex 1 subunit 4) This intronless gene encodes a protein that may play a role in organelle biogenesis associated with melanosomes, platelet dense granules, and lysosomes. A similar protein in mouse is a component of a protein complex termed biogenesis of lysosome-related organelles complex 1 (BLOC-1), and is a model for Hermansky-Pudlak syndrome. The encoded protein may play a role in intracellular vesicular trafficking. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 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
BLOC1S4	NM_018366.3	c.329C>G	p.Ser110Trp	missense_variant	Exon 1 of 1	ENST00000320776.5	NP_060836.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BLOC1S4	ENST00000320776.5	c.329C>G	p.Ser110Trp	missense_variant	Exon 1 of 1	6	NM_018366.3	ENSP00000318128.3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.90
BayesDel_addAF	Uncertain	0.034	T
BayesDel_noAF	Benign	-0.19
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.65	D
Eigen	Uncertain	0.51
Eigen_PC	Uncertain	0.40
FATHMM_MKL	Uncertain	0.81	D
LIST_S2	Uncertain	0.90	D
M_CAP	Pathogenic	0.40	D
MetaRNN	Uncertain	0.63	D
MetaSVM	Benign	-0.51	T
MutationAssessor	Pathogenic	2.9	M
PrimateAI	Pathogenic	0.89	D
PROVEAN	Pathogenic	-5.0	D
REVEL	Benign	0.27
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0030	D
Polyphen		1.0	D
Vest4		0.43
MutPred		0.43		Loss of disorder (P = 5e-04);
MVP		0.70
MPC		2.1
ClinPred		1.0	D
GERP RS		3.3
Varity_R		0.72
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: rs772738241; hg19: chr4-6718265;