chr16-83906999-G-T

Variant names:

• chr16-83906999-G-T
• rs147617160
• NM_012213.3:c.541G>T

Variant summary

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

The NM_012213.3(MLYCD):​c.541G>T​(p.Val181Leu) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,461,728 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. V181M) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: MLYCD NM_012213.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.37
• Publications: 0 publications found

Genes affected

MLYCD (HGNC:7150): (malonyl-CoA decarboxylase) The product of this gene catalyzes the breakdown of malonyl-CoA to acetyl-CoA and carbon dioxide. Malonyl-CoA is an intermediate in fatty acid biosynthesis, and also inhibits the transport of fatty acyl CoAs into mitochondria. Consequently, the encoded protein acts to increase the rate of fatty acid oxidation. It is found in mitochondria, peroxisomes, and the cytoplasm. Mutations in this gene result in malonyl-CoA decarboyxlase deficiency. [provided by RefSeq, Jul 2008]

MLYCD Gene-Disease associations (from GenCC):

• malonic aciduria

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), G2P, Orphanet, PanelApp Australia

ENSG00000288849 (HGNC:):

ACMG classification

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

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

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_012213.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MLYCD	NM_012213.3	MANE Select	c.541G>T	p.Val181Leu	missense	Exon 2 of 5	NP_036345.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MLYCD	ENST00000262430.6	TSL:1 MANE Select	c.541G>T	p.Val181Leu	missense	Exon 2 of 5	ENSP00000262430.4
	ENSG00000288849	ENST00000689373.1		n.1214G>T		non_coding_transcript_exon	Exon 6 of 9
	ENSG00000288849	ENST00000692462.1		n.1182G>T		non_coding_transcript_exon	Exon 6 of 9

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461728 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727184

African (AFR) AF: 0.00 AC: 0 AN: 33476

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39696

South Asian (SAS) AF: 0.00 AC: 0 AN: 86250

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

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

European-Non Finnish (NFE) AF: 0.00000270 AC: 3 AN: 1111868

Other (OTH) AF: 0.00 AC: 0 AN: 60392

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.30
BayesDel_addAF	Uncertain	0.078	D
BayesDel_noAF	Benign	-0.13
CADD	Benign	22
DANN	Benign	0.91
DEOGEN2	Benign	0.19	T
Eigen	Uncertain	0.27
Eigen_PC	Uncertain	0.29
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.86	D
M_CAP	Benign	0.077	D
MetaRNN	Uncertain	0.58	D
MetaSVM	Uncertain	0.27	D
MutationAssessor	Uncertain	2.1	M
PhyloP100		4.4
PrimateAI	Uncertain	0.62	T
PROVEAN	Benign	-1.0	N
REVEL	Uncertain	0.41
Sift	Benign	0.51	T
Sift4G	Benign	0.64	T
Polyphen		0.75	P
Vest4		0.51
MutPred		0.64		Loss of catalytic residue at V181 (P = 0.0424)
MVP		0.93
MPC		0.020
ClinPred		0.57	D
GERP RS		5.2
Varity_R		0.53
gMVP		0.44

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: rs147617160; hg19: chr16-83940604;