chr22-43972324-A-C

Variant names:

• chr22-43972324-A-C
• rs3177036
• NM_015380.5:c.411A>C

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_015380.5(SAMM50):​c.411A>C​(p.Gly137Gly) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000278 in 1,441,340 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. G137G) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000028 (0 hom.)
• Consequence: SAMM50 NM_015380.5 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.553
• Publications: 20 publications found

Genes affected

SAMM50 (HGNC:24276): (SAMM50 sorting and assembly machinery component) This gene encodes a component of the Sorting and Assembly Machinery (SAM) of the mitochondrial outer membrane. The Sam complex functions in the assembly of beta-barrel proteins into the outer mitochondrial membrane.[provided by RefSeq, Jun 2011]

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.57).
• BP7: Synonymous conserved (PhyloP=-0.553 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015380.5. 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
	SAMM50	NM_015380.5	MANE Select	c.411A>C	p.Gly137Gly	synonymous	Exon 5 of 15	NP_056195.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SAMM50	ENST00000350028.5	TSL:1 MANE Select	c.411A>C	p.Gly137Gly	synonymous	Exon 5 of 15	ENSP00000345445.4	Q9Y512
	SAMM50	ENST00000943220.1		c.411A>C	p.Gly137Gly	synonymous	Exon 5 of 15	ENSP00000613279.1
	SAMM50	ENST00000854677.1		c.411A>C	p.Gly137Gly	synonymous	Exon 5 of 15	ENSP00000524736.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000278 AC: 4 AN: 1441340 Hom.: 0 Cov.: 27 AF XY: 0.00000279 AC XY: 2 AN XY: 717130

African (AFR) AF: 0.00 AC: 0 AN: 32608

American (AMR) AF: 0.00 AC: 0 AN: 40028

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25708

East Asian (EAS) AF: 0.00 AC: 0 AN: 39290

South Asian (SAS) AF: 0.00 AC: 0 AN: 82240

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53204

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5696

European-Non Finnish (NFE) AF: 0.00000363 AC: 4 AN: 1103068

Other (OTH) AF: 0.00 AC: 0 AN: 59498

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.57
CADD	Benign	4.1
DANN	Benign	0.79
PhyloP100		-0.55

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs3177036; hg19: chr22-44368204;