5-10250229-G-A

Variant names:

• chr5-10250229-G-A
• rs745933943
• ENST00000515390.5:c.-112G>A

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The ENST00000515390.5(CCT5):​c.-112G>A variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000212 in 1,572,494 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000085 (0 hom., cov: 31)
  • Exomes 𝑓: 0.00023 (0 hom.)
• Consequence: CCT5 ENST00000515390.5 5_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -2.84
• Publications: 0 publications found

Genes affected

CCT5 (HGNC:1618): (chaperonin containing TCP1 subunit 5) The protein encoded by this gene is a molecular chaperone that is a member of the chaperonin containing TCP1 complex (CCT), also known as the TCP1 ring complex (TRiC). This complex consists of two identical stacked rings, each containing eight different proteins. Unfolded polypeptides enter the central cavity of the complex and are folded in an ATP-dependent manner. The complex folds various proteins, including actin and tubulin. Mutations in this gene cause hereditary sensory and autonomic neuropathy with spastic paraplegia (HSNSP). Alternative splicing results in multiple transcript variants. Related pseudogenes have been identified on chromosomes 5 and 13. [provided by RefSeq, Apr 2015]

CCT5 Gene-Disease associations (from GenCC):

• hereditary sensory and autonomic neuropathy with spastic paraplegia

  Inheritance: AR, Unknown Classification: SUPPORTIVE, LIMITED Submitted by: Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae)
• complex neurodevelopmental disorder

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.78).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CCT5	NM_001306153.1	c.42+184G>A		intron_variant	Intron 1 of 10		NP_001293082.1
CCT5	NM_012073.5	c.-112G>A		upstream_gene_variant		ENST00000280326.9	NP_036205.1
CCT5	NM_001306154.2	c.-112G>A		upstream_gene_variant			NP_001293083.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CCT5	ENST00000280326.9	c.-112G>A		upstream_gene_variant		1	NM_012073.5	ENSP00000280326.4

Frequencies

GnomAD3 genomes AF: 0.0000854 AC: 13 AN: 152230 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.0000482

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000147

Gnomad OTH AF: 0.000478

GnomAD2 exomes AF: 0.0000810 AC: 15 AN: 185188 AF XY: 0.0000899

Gnomad AFR exome AF: 0.0000895

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: 0.000184

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.000226 AC: 321 AN: 1420264 Hom.: 0 Cov.: 47 AF XY: 0.000228 AC XY: 160 AN XY: 703154

African (AFR) AF: 0.0000614 AC: 2 AN: 32556

American (AMR) AF: 0.00 AC: 0 AN: 38212

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25452

East Asian (EAS) AF: 0.00 AC: 0 AN: 36964

South Asian (SAS) AF: 0.00 AC: 0 AN: 82152

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49824

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5718

European-Non Finnish (NFE) AF: 0.000290 AC: 316 AN: 1090502

Other (OTH) AF: 0.0000509 AC: 3 AN: 58884

GnomAD4 genome AF: 0.0000854 AC: 13 AN: 152230 Hom.: 0 Cov.: 31 AF XY: 0.0000538 AC XY: 4 AN XY: 74372

African (AFR) AF: 0.0000482 AC: 2 AN: 41464

American (AMR) AF: 0.00 AC: 0 AN: 15290

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5188

South Asian (SAS) AF: 0.00 AC: 0 AN: 4836

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10620

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.000147 AC: 10 AN: 68042

Other (OTH) AF: 0.000478 AC: 1 AN: 2094

Alfa AF: 0.0000868 Hom.: 0

Bravo AF: 0.0000642

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hereditary sensory and autonomic neuropathy with spastic paraplegia Uncertain:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.78
CADD	Benign	0.037
DANN	Benign	0.85
PhyloP100		-2.8
PromoterAI		-0.13	Neutral

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

Other links and lift over

dbSNP: rs745933943; hg19: chr5-10250341;