chr9-127872777-CCC-ACG

Variant names:

• chr9-127872777-CCC-ACG
• NM_000476.3:c.118_120delGGGinsCGT
• AK1 p.Gly40Arg

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PS1

The NM_000476.3(AK1):​c.118_120delGGGinsCGT​(p.Gly40Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. It is difficult to determine the true allele frequency of this variant because it is of type MNV, and the frequency of such variant types in population databases may be underestimated and unreliable. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Pathogenic in ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: AK1 NM_000476.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.51
• Publications: 0 publications found

Genes affected

AK1 (HGNC:361): (adenylate kinase 1) This gene encodes an adenylate kinase enzyme involved in energy metabolism and homeostasis of cellular adenine nucleotide ratios in different intracellular compartments. This gene is highly expressed in skeletal muscle, brain and erythrocytes. Certain mutations in this gene resulting in a functionally inadequate enzyme are associated with a rare genetic disorder causing nonspherocytic hemolytic anemia. Alternative splicing of this gene results in multiple transcript variants encoding different isoforms. This gene shares readthrough transcripts with the upstream ST6GALNAC6 gene. [provided by RefSeq, Jan 2022]

AK1 Gene-Disease associations (from GenCC):

• hemolytic anemia due to adenylate kinase deficiency

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

ENSG00000257524 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PS1: Transcript NM_000476.3 (AK1) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in ClinVar.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000476.3. 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
	AK1	NM_000476.3	MANE Select	c.118_120delGGGinsCGT	p.Gly40Arg	missense	N/A	NP_000467.1	P00568
	AK1	NM_001318122.2		c.166_168delGGGinsCGT	p.Gly56Arg	missense	N/A	NP_001305051.1	Q5T9B7
	AK1	NM_001318121.1		c.118_120delGGGinsCGT	p.Gly40Arg	missense	N/A	NP_001305050.1	Q6FGX9

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AK1	ENST00000644144.2	MANE Select	c.118_120delGGGinsCGT	p.Gly40Arg	missense	N/A	ENSP00000494600.1	P00568
	ENSG00000257524	ENST00000646171.1		n.*151_*153delGGGinsCGT		non_coding_transcript_exon	Exon 10 of 13	ENSP00000495484.1	A0A2R8YFX0
	ENSG00000257524	ENST00000646171.1		n.*151_*153delGGGinsCGT		3_prime_UTR	Exon 10 of 13	ENSP00000495484.1	A0A2R8YFX0

Frequencies

GnomAD3 genomes Cov.: 32

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

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		7.5

Splicing

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: chr9-130635056;