# NM_001765.3(CD1C):c.451C>T (p.Pro151Ser)

https://sugi.bio/variant/cd1c-p-pro151ser

## Summary

**CD1C p.Pro151Ser (c.451C>T)** is classified **Uncertain significance** in CD1C (ClinVar, Single submitter, 1 submitter; last evaluated 2023-12-21). AlphaMissense: likely benign (0.2279); Ultra-rare (popmax 0.0384%, sas).

**At a glance:** Uncertain significance · review: Single submitter · rsID rs771222792 · 1 submitter · AlphaMissense likely benign · ultra-rare (popmax 0.0384%, sas)

## For patients & families {#patients}

This is a change in the CD1C gene that is currently of uncertain significance — a definitive interpretation has not yet been established, submitted by 1 submitter.

*Reference information, not medical advice, and not a prediction for any individual. A genetic counselor or clinician can interpret what it means for you and your family.*

**Support & next steps:** [Find a genetic counselor (NSGC)](https://findageneticcounselor.nsgc.org/).

## Identity {#identity}

| Field | Value |
| --- | --- |
| Gene | [CD1C](https://sugi.bio/atlas/gene/CD1C/) |
| Protein change (HGVS p.) | p.Pro151Ser |
| Coding change (HGVS c.) | c.451C>T |
| MANE Select transcript | [NM_001764](https://www.ncbi.nlm.nih.gov/nuccore/NM_001764) (variant reported on NM_001765) |
| dbSNP | [rs771222792](https://www.ncbi.nlm.nih.gov/snp/rs771222792/) |
| Variant type | single nucleotide variant |
| Location | chr1:158292206-158292206 (GRCh38) |
| ClinVar | [VCV3140387](https://www.ncbi.nlm.nih.gov/clinvar/variation/3140387/) |

**All HGVS expressions:** `NC_000001.10:g.158261996C>T`, `NC_000001.11:g.158292206C>T`, `NM_001765.3:c.451C>T`

## Computational & population evidence {#evidence}

**Concordance:** Mixed / partial computational evidence (see below).

- AlphaMissense **likely benign** (0.2279)
- REVEL 0.119 (moderately benign-leaning) — agrees with AlphaMissense
- SaProt LLR -12.05 (damaging) — differs from AlphaMissense
- → **In-silico consensus:** SaProt calls this damaging; AlphaMissense and REVEL do not
- Conservation: phyloP 0.086, GERP -1.15 — not a conserved position (phyloP < 0.1, ACGS BP7 cut)
- CADD: **PHRED 19.65**. No single ClinGen-calibrated threshold exists and the expert panels that use CADD disagree — GUCY2D/AIPL1 require ≥ 20.0 for an untranslated-region variant, ABCA4 ≥ 28.1 for a synonymous or indel variant, the Pulmonary Hypertension panel imports Pejaver 2022's missense-calibrated numbers, and the Antibody Deficiencies panel declines CADD entirely for PIK3CD. CADD v1.7 also incorporates Zoonomia phyloP, so it partly re-expresses the conservation above. *Descriptive; no threshold applied.*
- Regional missense constraint: **o/e 1.06** across the covering region of the MANE Select transcript (158,290,065–158,293,473), spanning 3,408 bp. Chi-square p 0.27. Describes the region, not this allele; gnomAD v4.1.1's own constrained determination. *Descriptive; no ACMG code applied.*
- SpliceAI: **not looked up on this page** — it was served without the gene's SpliceAI index, so no lookup was made. This is a gap in this page, not in the data, and says nothing about whether a splicing effect is predicted.
- Population frequency (gnomAD v4.1): grpmax **0.0384%** (sas) · FAF95 0.0283% · FAF99 0.0249% · 35/91,084 in the highest group · 66/1,614,042 alleles overall — ultra-rare (popmax 0.0384%, sas).

| Ancestry group | Allele frequency | 1 in |
| --- | --- | --- |
| South Asian (grpmax) | 0.0384% | 2,602 |
| European (non-Finnish) | 0.00246% | 40,691 |
| Remaining individuals (not grpmax-eligible) | 0.0016% | 62,486 |
| African / African-American | 0.00133% | 74,916 |

*Computational predictors are not independent (ClinGen Variant Classification guidance): AlphaMissense (Cheng et al. 2023) carries the ACMG weight for missense and conservation (phyloP/GERP/phastCons) for non-missense; REVEL (Pejaver-2022 calibrated strength bands) and SaProt (Su et al. 2023, structure-aware, ClinVar-independent protein language model, raw LLR) are shown as orthogonal agreement signals, not additive. For frequency, the gnomAD v4.1 grpmax filtering allele frequency (FAF95) is ClinGen's designated BA1/BS1 input (gnomAD v4 guidance v3.0, June 2025); BA1/BS1 thresholds are disease-specific, not a blanket 5%. Predictions, not a clinical determination.*

## Clinical significance {#significance}

**Uncertain significance** — review status Single submitter *(criteria provided, single submitter)*, last evaluated 2023-12-21.

**Submitter consensus:** unanimous (1/1 Uncertain significance).

### Submitter classifications {#submitters}

| Submitter | Classification | Review | Method | Date |
| --- | --- | --- | --- | --- |
| Ambry Genetics | Uncertain significance | criteria provided, single submitter | clinical testing | 2023-12-21 |

**Reported phenotype names (ClinVar):** not specified, AllHighlyPenetrant.

### Data sources & attribution {#sources}

ClinVar (NCBI — public domain, built 2026-10-11); gnomAD v4.1 (Broad Institute, built 2026-10-06); AlphaMissense (Cheng et al. 2023, © Google DeepMind — CC BY 4.0, built 2026-01-27); REVEL (Ioannidis et al. 2016 — ODbL, built 2026-07-13); SaProt (Su et al. 2023 — MIT, built 2026-07-14); SpliceAI (Illumina — free for non-commercial use, built 2026-10-13); CADD (Rentzsch et al. 2019, University of Washington — free for non-commercial use, built 2026-10-10); Conservation (phyloP/phastCons/GERP) (UCSC hg38 470-way mammal (Hiller Lab) + Ensembl Compara, built 2026-07-12); gnomAD Non-coding Constraint (Gnocchi) (Chen et al. 2024, Broad Institute — CC0, built 2026-10-11); gnomAD Regional Missense Constraint (Broad Institute — CC0, built 2026-10-13); Pangolin (Zeng & Li 2022 — CC BY 4.0, built 2026-10-11); Repeat regions (UCSC — RepeatMasker, TRF, segmental duplications, built 2026-10-11); ClinGen (ClinGen, built 2026-09-22); UniProt (CC BY 4.0); Reactome / GO (CC BY 4.0, built 2026-09-23); MaveDB (per-record license, built 2026-10-11); CIViC (CC0, built 2026-09-22); Orphanet (Orphanet, built 2026-06-12)

*Primary record: NCBI ClinVar (variation 3140387). Classifications reflect these databases as of the page's build date and may change. Free reference use — not medical advice; consult the primary submitters and a clinician.*