Is BCOR p.Ile735Val (c.2203A>G) pathogenic?

BCOR p.Ile735Val (c.2203A>G) is classified Conflicting classifications of pathogenicity in BCOR (ClinVar, Conflicting submitters, 2 submitters; last evaluated 2017-10-14). AlphaMissense: likely benign (0.0722); Very rare (popmax 0.0019%, nfe); Associated with microphthalmia, syndromic 2.

What condition is associated with BCOR p.Ile735Val (c.2203A>G)?

BCOR p.Ile735Val (c.2203A>G) is associated with microphthalmia, syndromic 2 (ClinVar).

How common is BCOR p.Ile735Val (c.2203A>G) in the general population?

BCOR p.Ile735Val (c.2203A>G) is very rare (popmax 0.0019%, nfe) (gnomAD).

What do computational predictors say about BCOR p.Ile735Val (c.2203A>G)?

AlphaMissense predicts likely benign (score 0.0722) — an in-silico prediction, not a clinical call.

BCOR p.Ile735Val

c.2203A>G · rs768557634 · VCV377338

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.0722 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.0019%, nfe)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

microphthalmia, syndromic 2

Computational evidence

Protein change
AlphaMissense	0.0722	likely benign
REVEL	0.044	moderately benign-leaning
SaProt	LLR -4.87	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.82	GERP -0.79, phastCons 1
Regional constraint	o/e 0.90	unconstrained · MANE · 2,116 bp · p 0.013 · regional, not allelic
Overall
CADD	18.1	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0019% European (non-Finnish) · 17/895,286 alleles

Filtering AF 0.00116% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000945%

Overall 0.0014% 17/1,210,449 alleles · very rare

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: BCOR
Protein: p.Ile735Val
Coding: c.2203A>G
MANE Select: NM_001123385
dbSNP: rs768557634
Type: single nucleotide variant
Location: chrX:40073143 (GRCh38)
Structure: AlphaFold pLDDT 39.82 · 5 PDB

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

Disease context

microphthalmia, syndromic 2 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

BCOR p.Arg1163Ter Pathogenic ★★ same condition
BCOR p.Arg1217Ter Pathogenic ★★ same condition
BCOR p.Arg1514Ter Pathogenic ★★ same condition
BCOR p.Arg342Ter Pathogenic ★★ same condition
BCOR p.Arg976Ter Pathogenic ★★ same condition
BCOR p.Ala1262Ser Uncertain significance ★★ ⚠ same condition
BCOR p.Ala1307Pro Uncertain significance ★★ ⚠ same condition
BCOR p.Ala165Pro 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/bcor-p-ile735val (accessed [today's date]).

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