Is BCR p.Pro134Leu (c.401C>T) pathogenic?

BCR p.Pro134Leu (c.401C>T) is classified Uncertain significance in BCR (ClinVar, Single submitter, 1 submitter; last evaluated 2025-10-06). AlphaMissense: likely benign (0.0995); Absent from gnomAD v4.1.

How common is BCR p.Pro134Leu (c.401C>T) in the general population?

BCR p.Pro134Leu (c.401C>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about BCR p.Pro134Leu (c.401C>T)?

AlphaMissense predicts likely benign (score 0.0995) — an in-silico prediction, not a clinical call.

BCR p.Pro134Leu

c.401C>T · VCV4645630

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0995 · ACMG-weighted

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,519,816)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0995	likely benign
REVEL	0.041	moderately benign-leaning
SaProt	LLR -7.93	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 0.95	GERP 0.83, phastCons 0.033
Regional constraint	o/e 1.27	unconstrained · MANE · 73 kb · p 1.1e-11 · regional, not allelic
Overall
CADD	16.15	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

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

Population frequency

gnomAD v4.1 · exomes + genomes

No allele count reported in gnomAD v4.1 (AN 1,519,816). This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: BCR
Protein: p.Pro134Leu
Coding: c.401C>T
MANE Select: NM_004327
Type: single nucleotide variant
Location: chr22:23181361 (GRCh38)
Gene constraint: LOEUF 0.608 · pLI <0.01 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 65.61 · 5 PDB
Residue 134: the 'kinase' region; the 'disordered' region

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

Similar variants

BCR p.Ser356Arg Uncertain significance ★★ ⚠ same type
BCR c.2116-6C>G Benign/Likely benign ★★ same type
BCR c.2116-7C>A Benign/Likely benign ★★ same type
BCR c.2526+7G>T Benign/Likely benign ★★ same type
BCR c.3073-8T>C Benign ★★ same type
BCR c.3183-4G>A Benign ★★ same type
BCR p.Ala1257= Benign/Likely benign ★★ same type
BCR p.Ala152Val Benign ★★ ⚠ same type

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/bcr-p-pro134leu (accessed [today's date]).

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