rs164641

Variant names:

• chr3-52207213-T-C
• rs164641
• NM_000688.6:c.1165+462T>C

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_000688.6(ALAS1):​c.1165+462T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0623 in 151,874 control chromosomes in the GnomAD database, including 377 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.062 (377 hom., cov: 31)
• Consequence: ALAS1 NM_000688.6 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.03
• Publications: 5 publications found

Genes affected

ALAS1 (HGNC:396): (5'-aminolevulinate synthase 1) This gene encodes the mitochondrial enzyme which is catalyzes the rate-limiting step in heme (iron-protoporphyrin) biosynthesis. The enzyme encoded by this gene is the housekeeping enzyme; a separate gene encodes a form of the enzyme that is specific for erythroid tissue. The level of the mature encoded protein is regulated by heme: high levels of heme down-regulate the mature enzyme in mitochondria while low heme levels up-regulate. A pseudogene of this gene is located on chromosome 12. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jan 2015]

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.93).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0981 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000688.6. 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
	ALAS1	NM_000688.6	MANE Select	c.1165+462T>C		intron	N/A	NP_000679.1	P13196-1
	ALAS1	NM_001304444.1		c.1216+462T>C		intron	N/A	NP_001291373.1	B4DVA0
	ALAS1	NM_001304443.1		c.1165+462T>C		intron	N/A	NP_001291372.1	P13196-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ALAS1	ENST00000484952.6	TSL:1 MANE Select	c.1165+462T>C		intron	N/A	ENSP00000418779.1	P13196-1
	ALAS1	ENST00000310271.6	TSL:1	c.1165+462T>C		intron	N/A	ENSP00000309259.2	P13196-1
	ALAS1	ENST00000469224.5	TSL:1	c.1165+462T>C		intron	N/A	ENSP00000417719.1	P13196-1

Frequencies

GnomAD3 genomes AF: 0.0623 AC: 9452 AN: 151756 Hom.: 375 Cov.: 31

Gnomad AFR AF: 0.101

Gnomad AMI AF: 0.150

Gnomad AMR AF: 0.0578

Gnomad ASJ AF: 0.0332

Gnomad EAS AF: 0.0337

Gnomad SAS AF: 0.0346

Gnomad FIN AF: 0.0209

Gnomad MID AF: 0.0506

Gnomad NFE AF: 0.0510

Gnomad OTH AF: 0.0576

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.0623 AC: 9460 AN: 151874 Hom.: 377 Cov.: 31 AF XY: 0.0603 AC XY: 4478 AN XY: 74252

African (AFR) AF: 0.101 AC: 4166 AN: 41384

American (AMR) AF: 0.0577 AC: 881 AN: 15258

Ashkenazi Jewish (ASJ) AF: 0.0332 AC: 115 AN: 3468

East Asian (EAS) AF: 0.0332 AC: 171 AN: 5144

South Asian (SAS) AF: 0.0344 AC: 165 AN: 4800

European-Finnish (FIN) AF: 0.0209 AC: 221 AN: 10580

Middle Eastern (MID) AF: 0.0544 AC: 16 AN: 294

European-Non Finnish (NFE) AF: 0.0510 AC: 3463 AN: 67936

Other (OTH) AF: 0.0599 AC: 126 AN: 2104

Alfa AF: 0.0534 Hom.: 33

Bravo AF: 0.0671

Asia WGS AF: 0.0420 AC: 147 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.93
CADD	Benign	2.5
DANN	Benign	0.76
PhyloP100		-1.0
Mutation Taster		=100/0	polymorphism (auto)

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs164641;

hg19: chr3-52241229;