chr3-183037432-A-C

Position:

• chr3-183037432-A-C

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM2 PP3_Strong PP5

The NM_020166.5(MCCC1):​c.1380T>G​(p.Ile460Met) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,162 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: MCCC1 NM_020166.5 missense, splice_region
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: -0.0490

Genes affected

MCCC1 (HGNC:6936): (methylcrotonyl-CoA carboxylase subunit 1) This gene encodes the large subunit of 3-methylcrotonyl-CoA carboxylase. This enzyme functions as a heterodimer and catalyzes the carboxylation of 3-methylcrotonyl-CoA to form 3-methylglutaconyl-CoA. Mutations in this gene are associated with 3-Methylcrotonylglycinuria, an autosomal recessive disorder of leucine catabolism. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.973
• PP5: Variant 3-183037432-A-C is Pathogenic according to our data. Variant chr3-183037432-A-C is described in ClinVar as [Pathogenic]. Clinvar id is 1935.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MCCC1	NM_020166.5	c.1380T>G	p.Ile460Met	missense_variant, splice_region_variant	13/19	ENST00000265594.9	NP_064551.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MCCC1	ENST00000265594.9	c.1380T>G	p.Ile460Met	missense_variant, splice_region_variant	13/19	1	NM_020166.5	ENSP00000265594	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461162 Hom.: 0 Cov.: 33 AF XY: 0.00000138 AC XY: 1 AN XY: 726936

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000896 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

3-methylcrotonyl-CoA carboxylase 1 deficiency Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Jan 01, 2007

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.19
BayesDel_addAF	Pathogenic	0.38	D
BayesDel_noAF	Pathogenic	0.31
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.89	D;D;D;D
Eigen	Uncertain	0.27
Eigen_PC	Benign	0.084
FATHMM_MKL	Benign	0.72	D
LIST_S2	Uncertain	0.92	D;D;D;D
M_CAP	Uncertain	0.12	D
MetaRNN	Pathogenic	0.97	D;D;D;D
MetaSVM	Uncertain	0.78	D
MutationAssessor	Pathogenic	4.1	H;.;.;.
MutationTaster	Benign	1.0	A;A;A
PrimateAI	Benign	0.44	T
PROVEAN	Uncertain	-2.6	D;D;.;D
REVEL	Pathogenic	0.81
Sift	Uncertain	0.0010	D;D;.;D
Sift4G	Pathogenic	0.0010	D;D;D;.
Polyphen		1.0	D;D;.;D
Vest4		0.95
MutPred		0.92		Gain of sheet (P = 0.0477);.;.;.;
MVP		0.96
MPC		0.62
ClinPred		1.0	D
GERP RS		-2.0
Varity_R		0.81
gMVP		0.88

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.16		Details are displayed if max score is > 0.2

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

Publications

LitVar

Other links and lift over

dbSNP: rs119103218; hg19: chr3-182755220;