Is BBS5 p.Ser36= (c.108C>T) pathogenic?

BBS5 p.Ser36= (c.108C>T) is classified Benign in BBS5 (ClinVar, Multiple submitters, 4 submitters; last evaluated 2026-02-03). Common (popmax 9.4%, afr) — too common for a highly-penetrant pathogenic allele; Associated with Bardet-Biedl syndrome.

What condition is associated with BBS5 p.Ser36= (c.108C>T)?

BBS5 p.Ser36= (c.108C>T) is associated with Bardet-Biedl syndrome (ClinVar).

How is Bardet-Biedl syndrome inherited?

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

BBS5 p.Ser36=

Q: How common is BBS5 p.Ser36= (c.108C>T) in the general population?

BBS5 p.Ser36= (c.108C>T) is common (popmax 9.4%, afr) — too common for a highly-penetrant pathogenic allele (gnomAD).

c.108C>T · rs16823066 · VCV262634

Benign Multiple submitters

Classification

Benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

gnomAD v4.1

Common

common (popmax 9.4%, afr) — too common for a highly-penetrant pathogenic allele

Conditions

Bardet-Biedl syndrome

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 0.71	GERP -2.3, phastCons 0.94
Overall
CADD	6.648	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 9.4% African / African-American · 7,017/74,656 alleles

Filtering AF 9.22% ClinGen BA1/BS1 input FAF95, joint · FAF99 9.14%

Overall 0.497% 7,992/1,607,916 alleles · common

Ancestry group	Frequency	1 in
African / African-Americangrpmax	9.4%	11
Admixed American	0.643%	155
Remaining individualsnot grpmax-eligible	0.615%	163
Middle Eastern	0.347%	288
Ashkenazi Jewishnot grpmax-eligible	0.044%	2,274
South Asian	0.0187%	5,349
European (non-Finnish)	0.0132%	7,579

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: BBS5
Protein: p.Ser36=
Coding: c.108C>T
MANE Select: NM_152384
dbSNP: rs16823066
Type: single nucleotide variant
Location: chr2:169482299 (GRCh38)
Gene constraint: LOEUF 0.884 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 88.87 · 1 PDB

Full BBS5 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Bardet-Biedl syndrome — 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

BBS5 p.Ser36Thr Uncertain significance ★ ⚠ same residue
BBS5 c.143-1G>C Pathogenic/Likely pathogenic ★★ same condition
BBS5 c.209-1G>A Pathogenic/Likely pathogenic ★★ same condition
BBS5 c.209-2A>G Likely pathogenic ★★ same condition
BBS5 c.522+3A>G Pathogenic/Likely pathogenic ★★ same condition
BBS5 c.681+1G>T Pathogenic/Likely pathogenic ★★ same condition
BBS5 p.Arg138Cys Likely pathogenic ★★ same condition
BBS5 p.Arg138His 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/bbs5-p-ser36 (accessed [today's date]).

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