Is CASR p.Ala628= (c.1884C>A) pathogenic?

CASR p.Ala628= (c.1884C>A) is classified Likely benign in CASR (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-06-23). Very rare (popmax 0.005%, amr); Associated with Nephrolithiasis/nephrocalcinosis.

What condition is associated with CASR p.Ala628= (c.1884C>A)?

CASR p.Ala628= (c.1884C>A) is associated with Nephrolithiasis/nephrocalcinosis, autosomal dominant hypocalcemia 1, familial hypocalciuric hypercalcemia (ClinVar).

How common is CASR p.Ala628= (c.1884C>A) in the general population?

CASR p.Ala628= (c.1884C>A) is very rare (popmax 0.005%, amr) (gnomAD).

CASR p.Ala628=

c.1884C>A · rs767444434 · VCV1135034

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

very rare (popmax 0.005%, amr)

Conditions

Nephrolithiasis/nephrocalcinosis

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -0.11	GERP -1.8, phastCons 0.48
Overall
CADD	7.348	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.005% Admixed American · 3/60,026 alleles

Filtering AF 0.00133% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000668%

Overall 0.000479% 7/1,461,844 alleles · very rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.005%	20,009
African / African-American	0.004%	25,011
European (non-Finnish)	8.47e-05%	1,180,022

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: CASR
Protein: p.Ala628=
Coding: c.1884C>A
MANE Select: NM_000388
dbSNP: rs767444434
Type: single nucleotide variant
Location: chr3:122283838 (GRCh38)
Gene constraint: LOEUF 0.469 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 76.01 · 31 PDB
Residue 628: a UniProt-annotated variant site (in hhc1; impaired homodimerization; impaired cell membrane localization); an α-helix

Full CASR gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Nephrolithiasis/nephrocalcinosis — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: autosomal dominant hypocalcemia 1 familial hypocalciuric hypercalcemia

Similar variants

CASR p.Ala628Val Uncertain significance ★ ⚠ same residue
CASR c.1378-1G>C Likely pathogenic ★★ same condition
CASR c.1608+1G>A Likely pathogenic ★★ same condition
CASR c.1609-2A>G Likely pathogenic ★★ same condition
CASR c.186-1G>T Pathogenic ★★ same condition
CASR c.493-2A>C Likely pathogenic ★★ same condition
CASR p.Ala581Val Likely pathogenic ★★ ⚠ same condition
CASR p.Ala835Asp Pathogenic/Likely pathogenic ★★ ⚠ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/casr-p-ala628 (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown