NM_001672.3:c.186C>G

Variant names:

• chr20-34262857-C-G
• rs149537165
• NM_001672.3:c.186C>G

Variant summary

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

The NM_001672.3(ASIP):​c.186C>G​(p.Ile62Met) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,712 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. I62N) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: ASIP NM_001672.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.63
• Publications: 0 publications found

Genes affected

ASIP (HGNC:745): (agouti signaling protein) In mice, the agouti gene encodes a paracrine signaling molecule that causes hair follicle melanocytes to synthesize pheomelanin, a yellow pigment, instead of the black or brown pigment, eumelanin. Pleiotropic effects of constitutive expression of the mouse gene include adult-onset obesity, increased tumor susceptibility, and premature infertility. This gene is highly similar to the mouse gene and encodes a secreted protein that may (1) affect the quality of hair pigmentation, (2) act as a pharmacological antagonist of alpha-melanocyte-stimulating hormone, (3) play a role in neuroendocrine aspects of melanocortin action, and (4) have a functional role in regulating lipid metabolism in adipocytes. [provided by RefSeq, Jul 2008]

AHCY (HGNC:343): (adenosylhomocysteinase) S-adenosylhomocysteine hydrolase belongs to the adenosylhomocysteinase family. It catalyzes the reversible hydrolysis of S-adenosylhomocysteine (AdoHcy) to adenosine (Ado) and L-homocysteine (Hcy). Thus, it regulates the intracellular S-adenosylhomocysteine (SAH) concentration thought to be important for transmethylation reactions. Deficiency in this protein is one of the different causes of hypermethioninemia. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jun 2009]

AHCY Gene-Disease associations (from GenCC):

• hypermethioninemia with deficiency of S-adenosylhomocysteine hydrolase

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

ENSG00000250917 (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_001672.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ASIP	NM_001672.3	MANE Select	c.186C>G	p.Ile62Met	missense	Exon 3 of 4	NP_001663.2
	ASIP	NM_001385218.1		c.186C>G	p.Ile62Met	missense	Exon 3 of 4	NP_001372147.1	P42127

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ASIP	ENST00000374954.4	TSL:1 MANE Select	c.186C>G	p.Ile62Met	missense	Exon 3 of 4	ENSP00000364092.3	P42127
	ASIP	ENST00000568305.5	TSL:5	c.186C>G	p.Ile62Met	missense	Exon 3 of 4	ENSP00000454804.1	P42127
	ASIP	ENST00000962459.1		c.186C>G	p.Ile62Met	missense	Exon 5 of 6	ENSP00000632518.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461712 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 727168

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.0000224 AC: 1 AN: 44716

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26130

East Asian (EAS) AF: 0.00 AC: 0 AN: 39692

South Asian (SAS) AF: 0.00 AC: 0 AN: 86244

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53408

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111894

Other (OTH) AF: 0.00 AC: 0 AN: 60382

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.082
BayesDel_addAF	Benign	-0.086	T
BayesDel_noAF	Benign	-0.36
CADD	Benign	23
DANN	Benign	0.95
DEOGEN2	Benign	0.33	T
Eigen	Uncertain	0.64
Eigen_PC	Uncertain	0.55
FATHMM_MKL	Uncertain	0.87	D
LIST_S2	Benign	0.67	T
M_CAP	Benign	0.047	D
MetaRNN	Uncertain	0.45	T
MetaSVM	Benign	-0.70	T
MutationAssessor	Uncertain	2.6	M
PhyloP100		3.6
PrimateAI	Uncertain	0.56	T
PROVEAN	Benign	-0.29	N
REVEL	Benign	0.19
Sift	Uncertain	0.015	D
Sift4G	Benign	0.15	T
Polyphen		0.99	D
Vest4		0.31
MutPred		0.39		Loss of methylation at K60 (P = 0.071)
MVP		0.62
MPC		0.16
ClinPred		0.64	D
GERP RS		5.3
Varity_R		0.23
gMVP		0.13
Mutation Taster		=89/11	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: rs149537165; hg19: chr20-32850663;