2-197501064-C-A

Variant names:

• chr2-197501064-C-A
• rs2305560
• NM_002157.3:c.4-10C>A

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_002157.3(HSPE1):​c.4-10C>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000138 in 1,450,254 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: HSPE1 NM_002157.3 intron
• Scores: Splicing: ADA: 0.0002874
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.316
• Publications: 0 publications found

Genes affected

HSPE1 (HGNC:5269): (heat shock protein family E (Hsp10) member 1) This gene encodes a major heat shock protein which functions as a chaperonin. Its structure consists of a heptameric ring which binds to another heat shock protein in order to form a symmetric, functional heterodimer which enhances protein folding in an ATP-dependent manner. This gene and its co-chaperonin, HSPD1, are arranged in a head-to-head orientation on chromosome 2. Naturally occurring read-through transcription occurs between this locus and the neighboring locus MOBKL3.[provided by RefSeq, Feb 2011]

HSPE1-MOB4 (HGNC:49184): (HSPE1-MOB4 readthrough) This locus represents naturally occurring read-through transcription between the neighboring HSPE1 (heat shock 10kDa protein 1 (chaperonin 10)) and MOB4 (MOB family member 4, phocein) genes on chromosome 2. The read-through transcript produces a fusion protein that shares sequence identity with each individual gene product. [provided by RefSeq, Oct 2011]

HSPD1 (HGNC:5261): (heat shock protein family D (Hsp60) member 1) This gene encodes a member of the chaperonin family. The encoded mitochondrial protein may function as a signaling molecule in the innate immune system. This protein is essential for the folding and assembly of newly imported proteins in the mitochondria. This gene is adjacent to a related family member and the region between the 2 genes functions as a bidirectional promoter. Several pseudogenes have been associated with this gene. Two transcript variants encoding the same protein have been identified for this gene. Mutations associated with this gene cause autosomal recessive spastic paraplegia 13. [provided by RefSeq, Jun 2010]

HSPD1 Gene-Disease associations (from GenCC):

• hereditary spastic paraplegia 13

  Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• hypomyelinating leukodystrophy 4

  Inheritance: AR Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P, Orphanet, Ambry Genetics

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.76).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002157.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HSPE1	NM_002157.3	MANE Select	c.4-10C>A		intron	N/A	NP_002148.1
	HSPE1-MOB4	NM_001202485.2		c.4-10C>A		intron	N/A	NP_001189414.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HSPE1	ENST00000233893.10	TSL:1 MANE Select	c.4-10C>A		intron	N/A	ENSP00000233893.5
	HSPE1-MOB4	ENST00000604458.1	TSL:3	c.4-10C>A		intron	N/A	ENSP00000474534.1
	HSPE1	ENST00000463841.1	TSL:2	n.183C>A		non_coding_transcript_exon	Exon 1 of 2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000138 AC: 2 AN: 1450254 Hom.: 0 Cov.: 31 AF XY: 0.00000277 AC XY: 2 AN XY: 721012

African (AFR) AF: 0.00 AC: 0 AN: 32944

American (AMR) AF: 0.00 AC: 0 AN: 42712

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25662

East Asian (EAS) AF: 0.00 AC: 0 AN: 39652

South Asian (SAS) AF: 0.00 AC: 0 AN: 84598

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53260

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5716

European-Non Finnish (NFE) AF: 0.00000181 AC: 2 AN: 1105828

Other (OTH) AF: 0.00 AC: 0 AN: 59882

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.76
CADD	Benign	5.6
DANN	Benign	0.76
PhyloP100		-0.32
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.2

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.00029
dbscSNV1_RF	Benign	0.014
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

Other links and lift over

dbSNP: rs2305560; hg19: chr2-198365788;