Is CTRC p.His183= (c.549C>T) pathogenic?

CTRC p.His183= (c.549C>T) is classified Conflicting classifications of pathogenicity in CTRC (ClinVar, Conflicting submitters, 3 submitters; last evaluated 2025-10-09). Ultra-rare (popmax 0.0165%, mid); Associated with hereditary chronic pancreatitis.

What condition is associated with CTRC p.His183= (c.549C>T)?

CTRC p.His183= (c.549C>T) is associated with hereditary chronic pancreatitis (ClinVar).

How common is CTRC p.His183= (c.549C>T) in the general population?

CTRC p.His183= (c.549C>T) is ultra-rare (popmax 0.0165%, mid) (gnomAD).

CTRC p.His183=

Q: How is Autosomal dominant hereditary chronic pancreatitis inherited?

Typically Autosomal dominant (Orphanet). A genetic counselor can assess individual risk for a family.

c.549C>T · rs554399153 · VCV701538

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 3 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0165%, mid)

Conditions

hereditary chronic pancreatitis

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 -10	GERP -5.2
Overall
CADD	0.375	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0165% Middle Eastern · 1/6,062 alleles

Filtering AF 0.00359% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00294%

Overall 0.00427% 69/1,614,170 alleles · ultra-rare exomes 61/1,461,892 · genomes 8/152,278 · joint denominator

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0165%	6,062
Remaining individualsnot grpmax-eligible	0.0096%	10,417
South Asian	0.00769%	13,011
Admixed American	0.005%	20,009
European (non-Finnish)	0.00424%	23,601
African / African-American	0.00267%	37,521

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: CTRC
Protein: p.His183=
Coding: c.549C>T
MANE Select: NM_007272
dbSNP: rs554399153
Type: single nucleotide variant
Location: chr1:15444661 (GRCh38)
Gene constraint: LOEUF 1.147 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 94.03 · 1 PDB
Residue 183: the peptidase s1 domain; an α-helix

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

Disease context

hereditary chronic pancreatitis — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Autosomal dominant hereditary chronic pancreatitis (Orphanet):

Inheritance: Autosomal dominant
Onset: Adolescent, Childhood
Prevalence: 1-9 / 1 000 000 (France)

Similar variants

CTRC p.His183Asn Uncertain significance ★ ⚠ same residue
CTRC p.His183Gln Uncertain significance ★ same residue
CTRC c.494-1G>C Pathogenic/Likely pathogenic ★★ same condition
CTRC p.Arg29Ter Pathogenic/Likely pathogenic ★★ same condition
CTRC p.Gln174Ter Pathogenic/Likely pathogenic ★★ same condition
CTRC c.356+1G>A Uncertain significance ★★ same condition
CTRC c.40+4A>G Uncertain significance ★★ same condition
CTRC c.40+6C>T Uncertain significance ★★ 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/ctrc-p-his183 (accessed [today's date]).

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