16-20637445-T-G

Position:

• chr16-20637445-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001318890.3(ACSM1):​c.1123A>C​(p.Ile375Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: ACSM1 NM_001318890.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.995

Genes affected

ACSM1 (HGNC:18049): (acyl-CoA synthetase medium chain family member 1) Enables CoA-ligase activity. Predicted to be involved in acyl-CoA metabolic process and fatty acid biosynthetic process. Located in mitochondrial matrix. [provided by Alliance of Genome Resources, Apr 2022]

ACSM3 (HGNC:10522): (acyl-CoA synthetase medium chain family member 3) Enables butyrate-CoA ligase activity. Predicted to be involved in acyl-CoA metabolic process and fatty acid biosynthetic process. Located in mitochondrion. Implicated in IgA glomerulonephritis. Biomarker of ulcerative colitis. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.11762652).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ACSM1	NM_001318890.3	c.1123A>C	p.Ile375Leu	missense_variant	9/14	ENST00000520010.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ACSM1	ENST00000520010.6	c.1123A>C	p.Ile375Leu	missense_variant	9/14	1	NM_001318890.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 20, 2023

The c.1123A>C (p.I375L) alteration is located in exon 8 (coding exon 8) of the ACSM1 gene. This alteration results from a A to C substitution at nucleotide position 1123, causing the isoleucine (I) at amino acid position 375 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Benign	-0.26	T
BayesDel_noAF	Benign	-0.61
CADD	Benign	0.076
DANN	Benign	0.61
DEOGEN2	Benign	0.017	T;T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.2
FATHMM_MKL	Benign	0.065	N
M_CAP	Benign	0.0036	T
MetaRNN	Benign	0.12	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-0.035	N;N
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Benign	0.33	T
PROVEAN	Benign	-1.1	N;N
REVEL	Benign	0.16
Sift	Benign	0.19	T;T
Sift4G	Benign	0.39	T;T
Polyphen		0.0	B;B
Vest4		0.16
MutPred		0.59		Gain of sheet (P = 0.1208);Gain of sheet (P = 0.1208);
MVP		0.19
MPC		0.075
ClinPred		0.062	T
GERP RS		-1.6
Varity_R		0.084
gMVP		0.41

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr16-20648767;