Is CDK12 p.Gly1284= (c.3852C>T) pathogenic?

CDK12 p.Gly1284= (c.3852C>T) is classified Likely benign in CDK12 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-10-02). Very rare (popmax 0.00267%, afr).

How common is CDK12 p.Gly1284= (c.3852C>T) in the general population?

CDK12 p.Gly1284= (c.3852C>T) is very rare (popmax 0.00267%, afr) (gnomAD).

CDK12 p.Gly1284=

c.3852C>T · VCV3489159

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00267%, afr)

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 7.7	GERP 1.9, phastCons 1
Overall
CADD	15.89	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00267% African / African-American · 2/74,790 alleles

Filtering AF 0.000444% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000166%

Overall 0.000496% 8/1,611,888 alleles · very rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00267%	37,395
European (non-Finnish)	0.000509%	196,517

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: CDK12
Protein: p.Gly1284=
Coding: c.3852C>T
MANE Select: NM_016507
Type: single nucleotide variant
Location: chr17:39530695 (GRCh38)
Gene constraint: LOEUF 0.21 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 51.39 · 39 PDB
Residue 1284: the 'disordered' region

Full CDK12 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CDK12 p.Gly1284Asp Uncertain significance ★ ⚠ same residue
CDK12 p.Gly1284Ser Uncertain significance ★ ⚠ same residue
CDK12 c.2108+56T>A Benign/Likely benign ★★ same type
CDK12 c.2666+17A>C Benign ★★ same type
CDK12 c.2769-74G>A Benign ★★ same type
CDK12 c.2846+157G>T Benign ★★ same type
CDK12 c.2963+111T>A Benign ★★ same type
CDK12 c.2963+133G>A 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/cdk12-p-gly1284 (accessed [today's date]).

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