chr8-67064400-T-A

Variant names:

• chr8-67064400-T-A
• rs768356971
• ENST00000262210.11:c.2T>A

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PVS1_Moderate PM2

The NM_001364869.1(CSPP1):​c.2T>A​(p.Met1?) variant causes a start lost change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,164 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: CSPP1 NM_001364869.1 start_lost
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.129
• Publications: 0 publications found

Genes affected

CSPP1 (HGNC:26193): (centrosome and spindle pole associated protein 1) This gene encodes a centrosome and spindle pole associated protein. The encoded protein plays a role in cell-cycle progression and spindle organization, regulates cytokinesis, interacts with Nephrocystin 8 and is required for cilia formation. Mutations in this gene result in primary cilia abnormalities and classical Joubert syndrome. Alternatively spliced transcript variants encoding distinct isoforms have been found for this gene. [provided by RefSeq, Apr 2014]

COPS5 (HGNC:2240): (COP9 signalosome subunit 5) The protein encoded by this gene is one of the eight subunits of COP9 signalosome, a highly conserved protein complex that functions as an important regulator in multiple signaling pathways. The structure and function of COP9 signalosome is similar to that of the 19S regulatory particle of 26S proteasome. COP9 signalosome has been shown to interact with SCF-type E3 ubiquitin ligases and act as a positive regulator of E3 ubiquitin ligases. This protein is reported to be involved in the degradation of cyclin-dependent kinase inhibitor CDKN1B/p27Kip1. It is also known to be an coactivator that increases the specificity of JUN/AP1 transcription factors. [provided by RefSeq, Jul 2008]

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PVS1: Start lost variant, next in-frame start position is after 3 pathogenic variants. Next in-frame start position is after 37 codons. Genomic position: 67074253. Lost 0.029 part of the original CDS.
• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001364869.1. 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
	CSPP1	NM_001382391.1	MANE Select	c.-149T>A		5_prime_UTR	Exon 1 of 31	NP_001369320.1	A0A7I2V5W3
	CSPP1	NM_001364869.1		c.2T>A	p.Met1?	start_lost	Exon 1 of 30	NP_001351798.1	A0A7I2PHE7
	CSPP1	NM_024790.7		c.2T>A	p.Met1?	start_lost	Exon 1 of 29	NP_079066.5

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CSPP1	ENST00000262210.11	TSL:1	c.2T>A	p.Met1?	start_lost	Exon 1 of 30	ENSP00000262210.6	A0A7I2PHE7
	CSPP1	ENST00000678616.1	MANE Select	c.-149T>A		5_prime_UTR	Exon 1 of 31	ENSP00000504733.1	A0A7I2V5W3
	CSPP1	ENST00000676605.1		c.2T>A	p.Met1?	start_lost	Exon 1 of 30	ENSP00000503605.1	A0A7I2V3V5

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD2 exomes AF: 0.00000404 AC: 1 AN: 247680 AF XY: 0.00000743

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: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461164 Hom.: 0 Cov.: 31 AF XY: 0.00000413 AC XY: 3 AN XY: 726918

African (AFR) AF: 0.00 AC: 0 AN: 33466

American (AMR) AF: 0.00 AC: 0 AN: 44694

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26112

East Asian (EAS) AF: 0.00 AC: 0 AN: 39688

South Asian (SAS) AF: 0.0000232 AC: 2 AN: 86212

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53124

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5722

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111782

Other (OTH) AF: 0.00 AC: 0 AN: 60364

GnomAD4 genome Cov.: 31

ExAC AF: 0.00000827 AC: 1

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Joubert syndrome 21 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.55	D
BayesDel_noAF	Benign	-0.42
CADD	Benign	6.9
DANN	Benign	0.88
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.2
FATHMM_MKL	Benign	0.0063	N
LIST_S2	Uncertain	0.90	D
M_CAP	Benign	0.0059	T
MetaRNN	Uncertain	0.54	D
MetaSVM	Benign	-1.0	T
PhyloP100		-0.13
PROVEAN	Benign	0.060	N
REVEL	Benign	0.069
Sift	Pathogenic	0.0	D
Polyphen		0.0	B
Vest4		0.19
MutPred		0.84		Loss of stability (P = 0.0238)
MVP		0.081
ClinPred		0.12	T
GERP RS		0.26
PromoterAI		-0.15	Neutral
gMVP		0.13
Mutation Taster		=138/62	polymorphism

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: rs768356971; hg19: chr8-67976635;