chr7-107789600-T-G

Position:

• chr7-107789600-T-G

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM2 PP3_Strong PP5

The NM_000111.3(SLC26A3):​c.659A>C​(p.His220Pro) 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 Likely pathogenic (no stars). Synonymous variant affecting the same amino acid position (i.e. H220H) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 31)
• Consequence: SLC26A3 NM_000111.3 missense
• Clinical Significance: Likely pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 5.75

Genes affected

SLC26A3 (HGNC:3018): (solute carrier family 26 member 3) The protein encoded by this gene is a transmembrane glycoprotein that transports chloride ions across the cell membrane in exchange for bicarbonate ions. It is localized to the mucosa of the lower intestinal tract, particularly to the apical membrane of columnar epithelium and some goblet cells. The protein is essential for intestinal chloride absorption, and mutations in this gene have been associated with congenital chloride diarrhea. [provided by RefSeq, Oct 2008]

ACMG classification

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.958
• PP5: Variant 7-107789600-T-G is Pathogenic according to our data. Variant chr7-107789600-T-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 56008.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr7-107789600-T-G is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SLC26A3	NM_000111.3	c.659A>C	p.His220Pro	missense_variant	6/21	ENST00000340010.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLC26A3	ENST00000340010.10	c.659A>C	p.His220Pro	missense_variant	6/21	1	NM_000111.3	P1
SLC26A3	ENST00000379083.7	c.*450A>C		3_prime_UTR_variant, NMD_transcript_variant	6/20	2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 31

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Congenital secretory diarrhea, chloride type Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Juha Muilu Group; Institute for Molecular Medicine Finland (FIMM)

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.79
BayesDel_addAF	Pathogenic	0.46	D
BayesDel_noAF	Pathogenic	0.43
CADD	Uncertain	24
DANN	Uncertain	0.98
DEOGEN2	Pathogenic	0.82	D
Eigen	Uncertain	0.55
Eigen_PC	Uncertain	0.40
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.91	D
M_CAP	Pathogenic	0.29	D
MetaRNN	Pathogenic	0.96	D
MetaSVM	Pathogenic	0.97	D
MutationAssessor	Pathogenic	3.2	M
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.60	T
PROVEAN	Pathogenic	-6.9	D
REVEL	Pathogenic	0.82
Sift	Uncertain	0.0020	D
Sift4G	Uncertain	0.0040	D
Polyphen		1.0	D
Vest4		0.92
MutPred		0.78		Loss of catalytic residue at H220 (P = 0.138);
MVP		0.97
MPC		0.86
ClinPred		0.99	D
GERP RS		4.2
Varity_R		0.97
gMVP		0.97

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

Publications

LitVar

Other links and lift over

dbSNP: rs386833489; hg19: chr7-107430045;