6-8064375-A-C

Position:

• chr6-8064375-A-C

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_201280.3(BLOC1S5):​c.2T>G​(p.Met1?) variant causes a start lost 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. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: BLOC1S5 NM_201280.3 start_lost
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 1.28

Genes affected

BLOC1S5 (HGNC:18561): (biogenesis of lysosomal organelles complex 1 subunit 5) This gene encodes a component of BLOC-1 (biogenesis of lysosome-related organelles complex 1). Components of this complex are involved in the biogenesis of organelles such as melanosomes and platelet-dense granules. A mouse model for Hermansky-Pudlak Syndrome is mutated in the murine version of this gene. Alternative splicing results in multiple transcript variants. Read-through transcription exists between this gene and the upstream EEF1E1 (eukaryotic translation elongation factor 1 epsilon 1) gene, as well as with the downstream TXNDC5 (thioredoxin domain containing 5) gene. [provided by RefSeq, Dec 2010]

BLOC1S5-TXNDC5 (HGNC:):

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PVS1: Start lost variant, no new inframe start found.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 6-8064375-A-C is Pathogenic according to our data. Variant chr6-8064375-A-C is described in ClinVar as [Pathogenic]. Clinvar id is 3065169.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
BLOC1S5	NM_201280.3	c.2T>G	p.Met1?	start_lost	1/5	ENST00000397457.7
BLOC1S5-TXNDC5	NR_037616.1	n.40T>G		non_coding_transcript_exon_variant	1/13
EEF1E1-BLOC1S5	NR_037618.1	n.459-1759T>G		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
BLOC1S5	ENST00000397457.7	c.2T>G	p.Met1?	start_lost	1/5	1	NM_201280.3	P1
BLOC1S5	ENST00000244777.6	c.2T>G	p.Met1?	start_lost, NMD_transcript_variant	1/6	1
BLOC1S5	ENST00000627748.2	c.2T>G	p.Met1?	start_lost, NMD_transcript_variant	1/6	1
BLOC1S5	ENST00000543936.7	c.2T>G	p.Met1?	start_lost	1/4	2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hermansky-Pudlak syndrome 11 Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Center for Genomic Medicine, King Faisal Specialist Hospital and Research Center

Mar 26, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.53	D
BayesDel_noAF	Pathogenic	0.52
CADD	Uncertain	26
DANN	Uncertain	0.98
DEOGEN2	Uncertain	0.48	T;.
Eigen	Uncertain	0.25
Eigen_PC	Uncertain	0.26
FATHMM_MKL	Benign	0.52	D
LIST_S2	Uncertain	0.90	D;D
M_CAP	Uncertain	0.25	D
MetaRNN	Pathogenic	0.80	D;D
MetaSVM	Benign	-1.0	T
MutationTaster	Benign	1.0	D;D
PROVEAN	Benign	-1.3	N;N
REVEL	Benign	0.26
Sift	Pathogenic	0.0	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		0.90	P;.
Vest4		0.84
MutPred		0.63		Gain of catalytic residue at M1 (P = 0.0054);Gain of catalytic residue at M1 (P = 0.0054);
MVP		0.67
ClinPred		0.90	D
GERP RS		4.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.8
Varity_R		0.98
gMVP		0.53

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: rs1757381494; hg19: chr6-8064608;