3-149167992-ATT-ATTTTT

Variant names:

• chr3-149167992-A-ATTT
• rs397710976
• NM_032383.5:c.2887+17_2887+19dupTTT

Variant summary

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

The NM_032383.5(HPS3):​c.2887+17_2887+19dupTTT variant causes a intron change involving the alteration of a non-conserved nucleotide. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 0)
  • Exomes 𝑓: 0.000031 (0 hom.)
• Consequence: HPS3 NM_032383.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.188
• Publications: 0 publications found

Genes affected

HPS3 (HGNC:15597): (HPS3 biogenesis of lysosomal organelles complex 2 subunit 1) This gene encodes a protein containing a potential clathrin-binding motif, consensus dileucine signals, and tyrosine-based sorting signals for targeting to vesicles of lysosomal lineage. The encoded protein may play a role in organelle biogenesis associated with melanosomes, platelet dense granules, and lysosomes. Mutations in this gene are associated with Hermansky-Pudlak syndrome type 3. [provided by RefSeq, Apr 2015]

CP (HGNC:2295): (ceruloplasmin) The protein encoded by this gene is a metalloprotein that binds most of the copper in plasma and is involved in the peroxidation of Fe(II)transferrin to Fe(III) transferrin. Mutations in this gene cause aceruloplasminemia, which results in iron accumulation and tissue damage, and is associated with diabetes and neurologic abnormalities. Two transcript variants, one protein-coding and the other not protein-coding, have been found for this gene. [provided by RefSeq, Feb 2012]

CP Gene-Disease associations (from GenCC):

• aceruloplasminemia

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Ambry Genetics, Orphanet
• disorder of iron metabolism and transport

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_032383.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HPS3	NM_032383.5	MANE Select	c.2887+17_2887+19dupTTT		intron	N/A	NP_115759.2
	HPS3	NM_001308258.2		c.2392+17_2392+19dupTTT		intron	N/A	NP_001295187.1	G5E9V4
	CP	NR_046371.2		n.2843-1945_2843-1943dupAAA		intron	N/A

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HPS3	ENST00000296051.7	TSL:1 MANE Select	c.2887+17_2887+19dupTTT		intron	N/A	ENSP00000296051.2	Q969F9-1
	HPS3	ENST00000870872.1		c.2872+17_2872+19dupTTT		intron	N/A	ENSP00000540931.1
	HPS3	ENST00000870871.1		c.2833+17_2833+19dupTTT		intron	N/A	ENSP00000540930.1

Frequencies

GnomAD3 genomes Cov.: 0

GnomAD2 exomes AF: 0.0000243 AC: 5 AN: 206140 AF XY: 0.0000269

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000106

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000306 AC: 35 AN: 1141942 Hom.: 0 Cov.: 18 AF XY: 0.0000242 AC XY: 14 AN XY: 579610

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 23668

American (AMR) AF: 0.00 AC: 0 AN: 41224

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 23090

East Asian (EAS) AF: 0.00 AC: 0 AN: 35612

South Asian (SAS) AF: 0.0000263 AC: 2 AN: 76038

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 50464

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4948

European-Non Finnish (NFE) AF: 0.0000394 AC: 33 AN: 838074

Other (OTH) AF: 0.00 AC: 0 AN: 48824

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		-0.19

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs397710976;

hg19: chr3-148885779;