Is BBS7 p.Lys299Arg (c.896A>G) pathogenic?

BBS7 p.Lys299Arg (c.896A>G) is classified Uncertain significance in BBS7 (ClinVar, Single submitter, 1 submitter; last evaluated 2018-01-12). AlphaMissense: likely benign (0.077); Absent from gnomAD v4.1; Associated with Bardet-Biedl syndrome 7.

What condition is associated with BBS7 p.Lys299Arg (c.896A>G)?

BBS7 p.Lys299Arg (c.896A>G) is associated with Bardet-Biedl syndrome 7 (ClinVar).

How common is BBS7 p.Lys299Arg (c.896A>G) in the general population?

BBS7 p.Lys299Arg (c.896A>G) is absent from gnomAD v4.1 (gnomAD).

How is Bardet-Biedl syndrome inherited?

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

What do computational predictors say about BBS7 p.Lys299Arg (c.896A>G)?

AlphaMissense predicts likely benign (score 0.077) — an in-silico prediction, not a clinical call.

BBS7 p.Lys299Arg

c.896A>G · rs1726155956 · VCV901038

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.077 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

Bardet-Biedl syndrome 7

Computational evidence

Protein change
AlphaMissense	0.077	likely benign
REVEL	0.468	indeterminate
SaProt	LLR -3.32	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 4.1	GERP -0.93, phastCons 1
Regional constraint	o/e 0.87	unconstrained · MANE · 44 kb · p 0.00015 · regional, not allelic
Overall
CADD	18.33	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

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: BBS7
Protein: p.Lys299Arg
Coding: c.896A>G
MANE Select: NM_176824
dbSNP: rs1726155956
Type: single nucleotide variant
Location: chr4:121848882 (GRCh38)
Gene constraint: LOEUF 0.701 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 92.99

Full BBS7 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Bardet-Biedl syndrome 7 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Bardet-Biedl syndrome (Orphanet):

Inheritance: Autosomal recessive, Oligogenic
Onset: Antenatal, Childhood, Infancy, Neonatal
Prevalence: 1-9 / 100 000 (Specific population)

Similar variants

BBS7 p.Lys299Glu Uncertain significance ★★ ⚠ same residue
BBS7 c.1371+1G>A Likely pathogenic ★★ same condition
BBS7 c.1512-1G>A Likely pathogenic ★★ same condition
BBS7 c.1677-2A>G Pathogenic/Likely pathogenic ★★ same condition
BBS7 c.1891-2A>C Pathogenic/Likely pathogenic ★★ same condition
BBS7 c.529-2A>G Pathogenic/Likely pathogenic ★★ same condition
BBS7 c.849+1G>C Pathogenic/Likely pathogenic ★★ same condition
BBS7 p.Arg280Ter 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/bbs7-p-lys299arg (accessed [today's date]).

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