5-71012424-C-A

Variant names:

• chr5-71012424-C-A
• NM_004536.3:c.492G>T
• NAIP p.Ala164Ala

Variant summary

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

The NM_004536.3(NAIP):​c.492G>T​(p.Ala164Ala) variant causes a synonymous 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. Variant has been reported in ClinVar as (no stars).

• Frequency: Genomes: not found (cov: 33)
• Consequence: NAIP NM_004536.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.19
• Publications: 0 publications found

Genes affected

NAIP (HGNC:7634): (NLR family apoptosis inhibitory protein) This gene is part of a 500 kb inverted duplication on chromosome 5q13. This duplicated region contains at least four genes and repetitive elements which make it prone to rearrangements and deletions. The repetitiveness and complexity of the sequence have also caused difficulty in determining the organization of this genomic region. This copy of the gene is full length; additional copies with truncations and internal deletions are also present in this region of chromosome 5q13. It is thought that this gene is a modifier of spinal muscular atrophy caused by mutations in a neighboring gene, SMN1. The protein encoded by this gene contains regions of homology to two baculovirus inhibitor of apoptosis proteins, and it is able to suppress apoptosis induced by various signals. Alternative splicing and the use of alternative promoters results in multiple transcript variants. [provided by RefSeq, Nov 2016]

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=-0.66).
• BP7: Synonymous conserved (PhyloP=-1.19 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004536.3. 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
	NAIP	NM_004536.3	MANE Select	c.492G>T	p.Ala164Ala	synonymous	Exon 4 of 17	NP_004527.2	Q13075-1
	NAIP	NM_001346870.2		c.492G>T	p.Ala164Ala	synonymous	Exon 4 of 17	NP_001333799.1	Q13075-1
	NAIP	NM_022892.2		c.182+8235G>T		intron	N/A	NP_075043.1	Q13075-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NAIP	ENST00000517649.6	TSL:1 MANE Select	c.492G>T	p.Ala164Ala	synonymous	Exon 4 of 17	ENSP00000428657.2	Q13075-1
	NAIP	ENST00000194097.8	TSL:1	c.492G>T	p.Ala164Ala	synonymous	Exon 2 of 15	ENSP00000443944.1	Q13075-1
	NAIP	ENST00000508426.6	TSL:1	c.492G>T	p.Ala164Ala	synonymous	Exon 2 of 14	ENSP00000429545.1	E7EQW0

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 68

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.66
CADD	Benign	1.6
DANN	Benign	0.41
PhyloP100		-1.2

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		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

hg19: chr5-70308251;