rs1554492950

Variant names:

• chr8-6643018-G-C
• rs1554492950
• NM_024596.5:c.2477G>C

Your query was ambiguous. Multiple possible variants found:

• chr8-6643018-G-C
• chr8-6643018-G-T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_024596.5(MCPH1):​c.2477G>C​(p.Cys826Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,814 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. C826F) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: MCPH1 NM_024596.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.77
• Publications: 0 publications found

Genes affected

MCPH1 (HGNC:6954): (microcephalin 1) This gene encodes a DNA damage response protein. The encoded protein may play a role in G2/M checkpoint arrest via maintenance of inhibitory phosphorylation of cyclin-dependent kinase 1. Mutations in this gene have been associated with primary autosomal recessive microcephaly 1 and premature chromosome condensation syndrome. Alternatively spliced transcript variants have been described. [provided by RefSeq, Feb 2010]

MCPH1-AS1 (HGNC:51655): (MCPH1 antisense RNA 1)

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MCPH1	NM_024596.5	c.2477G>C	p.Cys826Ser	missense_variant	Exon 14 of 14	ENST00000344683.10	NP_078872.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MCPH1	ENST00000344683.10	c.2477G>C	p.Cys826Ser	missense_variant	Exon 14 of 14	1	NM_024596.5	ENSP00000342924.5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461814 Hom.: 0 Cov.: 29 AF XY: 0.00000138 AC XY: 1 AN XY: 727210

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44720

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86248

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53396

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111974

Other (OTH) AF: 0.00 AC: 0 AN: 60394

GnomAD4 genome Cov.: 33

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.50
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Uncertain	0.090
CADD	Benign	23
DANN	Uncertain	0.98
DEOGEN2	Benign	0.21	T
Eigen	Uncertain	0.51
Eigen_PC	Uncertain	0.43
FATHMM_MKL	Uncertain	0.82	D
M_CAP	Benign	0.079	D
MetaRNN	Uncertain	0.72	D
MetaSVM	Uncertain	0.70	D
MutationAssessor	Uncertain	2.4	M
PhyloP100		1.8
PrimateAI	Uncertain	0.49	T
PROVEAN	Uncertain	-3.5	D
REVEL	Pathogenic	0.71
Sift	Uncertain	0.017	D
Sift4G	Uncertain	0.023	D
Polyphen		1.0	D
Vest4		0.52
MutPred		0.54		Gain of disorder (P = 0.0026);
MVP		0.81
ClinPred		0.96	D
GERP RS		4.8
Varity_R		0.92
gMVP		0.36
Mutation Taster		=84/16	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs1554492950; hg19: chr8-6500539;