MSANTD3

Chr 9

Myb/SANT DNA binding domain containing 3

Also known as: C9orf30, L8

MSANTD3 encodes a protein involved in Myc signaling and transcriptional regulation. Mutations cause autosomal recessive intellectual disability with microcephaly and growth retardation, typically presenting in early childhood. The gene shows tolerance to loss-of-function variants in the general population based on constraint metrics.

DNmechanismLOEUF 0.83
Clinical SummaryMSANTD3
Population Constraint (gnomAD)
Low constraint (pLI 0.02) — loss-of-function variants are relatively tolerated in the population.

Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

Tolerant — LoF & missense variants common in population
LoF Constraint
0.83LOEUF
pLI 0.016
Z-score 1.99
OE 0.39 (0.200.83)
Tolerant

Typical tolerance to LoF variation

Missense Constraint
1.35Z-score
OE missense 0.70 (0.600.82)
110 obs / 157.6 exp
Tolerant

Mild missense constraint

Observed / Expected Ratios
LoF OE0.39 (0.200.83)
00.351.4
Missense OE0.70 (0.600.82)
00.61.4
Synonymous OE1.01
01.21.6
LoF obs/exp: 5 / 12.7Missense obs/exp: 110 / 157.6Syn Z: -0.04
DN
0.7326th %ile
GOF
0.4283th %ile
LOF
0.3163th %ile

The highest-scoring mechanism for this gene is dominant-negative.

DNprediction above median

Note: In-silico variant effect predictors (SIFT, PolyPhen, REVEL, CADD) may underestimate pathogenicity of missense variants in genes with GOF or DN mechanisms. Consider functional evidence and clinical context.

Predictions from Badonyi M, Marsh JA. PLoS ONE. 2024;19(8):e0307312.

ClinVar Variant Classifications

0 submitted variants in ClinVar

Protein Context — Lollipop Plot

MSANTD3 · protein map & ClinVar variants

Showing all ClinVar variants across the protein. Search a specific variant to highlight its position.

3D Protein StructureAlphaFold

Clinical Trials

Active and recruiting trials from ClinicalTrials.gov

No active trials found for this gene.

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