1-86486539-T-C

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_001285.4(CLCA1):c.968T>C(p.Leu323Pro) variant causes a missense change. 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 Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CLCA1 NM_001285.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.05

Genes affected

CLCA1 (HGNC:2015): (chloride channel accessory 1) This gene encodes a member of the calcium sensitive chloride conductance protein family. To date, all members of this gene family map to the same region on chromosome 1p31-p22 and share a high degree of homology in size, sequence, and predicted structure, but differ significantly in their tissue distributions. The encoded protein is expressed as a precursor protein that is processed into two cell-surface-associated subunits, although the site at which the precursor is cleaved has not been precisely determined. The encoded protein may be involved in mediating calcium-activated chloride conductance in the intestine. [provided by RefSeq, Jul 2008]

LOC124904210 (HGNC:):

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.969

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CLCA1	NM_001285.4	c.968T>C	p.Leu323Pro	missense_variant	7/14	ENST00000394711.2
LOC124904210	XR_007066206.1	n.226-5731A>G		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CLCA1	ENST00000394711.2	c.968T>C	p.Leu323Pro	missense_variant	7/14	1	NM_001285.4	P1
CLCA1	ENST00000234701.7	c.968T>C	p.Leu323Pro	missense_variant	8/15	1		P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 13, 2023

The c.968T>C (p.L323P) alteration is located in exon 7 (coding exon 7) of the CLCA1 gene. This alteration results from a T to C substitution at nucleotide position 968, causing the leucine (L) at amino acid position 323 to be replaced by a proline (P). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.78
BayesDel_addAF	Pathogenic	0.21	D
BayesDel_noAF	Uncertain	0.070
Cadd	Pathogenic	26
Dann	Uncertain	1.0
DEOGEN2	Benign	0.11	T;T
Eigen	Uncertain	0.65
Eigen_PC	Uncertain	0.57
FATHMM_MKL	Pathogenic	0.98	D
M_CAP	Benign	0.063	D
MetaRNN	Pathogenic	0.97	D;D
MetaSVM	Benign	-0.91	T
MutationAssessor	Pathogenic	3.4	M;M
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.54	T
PROVEAN	Pathogenic	-6.3	D;D
REVEL	Uncertain	0.55
Sift	Pathogenic	0.0	D;D
Sift4G	Pathogenic	0.0010	D;D
Polyphen		1.0	D;D
Vest4		0.87
MutPred		0.83		Gain of disorder (P = 0.0122);Gain of disorder (P = 0.0122);
MVP		0.39
MPC		0.52
ClinPred		1.0	D
GERP RS		5.5
Varity_R		0.99
gMVP		0.84

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		Details are displayed if max score is > 0.2

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-86952222;