1-155291760-T-G

Variant names:

• chr1-155291760-T-G
• NM_000298.6:c.1614A>C
• PKLR p.Glu538Asp

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM1 PM2 PP2 PP3

The NM_000298.6(PKLR):​c.1614A>C​(p.Glu538Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 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 Uncertain significance in ClinVar.

• Frequency: Genomes: not found (cov: 31)
• Consequence: PKLR NM_000298.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.264
• Publications: 0 publications found

Genes affected

PKLR (HGNC:9020): (pyruvate kinase L/R) The protein encoded by this gene is a pyruvate kinase that catalyzes the transphosphorylation of phohsphoenolpyruvate into pyruvate and ATP, which is the rate-limiting step of glycolysis. Defects in this enzyme, due to gene mutations or genetic variations, are the common cause of chronic hereditary nonspherocytic hemolytic anemia (CNSHA or HNSHA). Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

PKLR Gene-Disease associations (from GenCC):

• pyruvate kinase deficiency of red cells

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Laboratory for Molecular Medicine, Orphanet, Labcorp Genetics (formerly Invitae), ClinGen
• pyruvate kinase hyperactivity

  Inheritance: AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 6 uncertain in NM_000298.6
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 45 curated pathogenic missense variants (we use a threshold of 10). The gene has 0 curated benign missense variants. Gene score misZ: 0.98056 (below the threshold of 3.09). Trascript score misZ: 1.5963 (below the threshold of 3.09). GenCC associations: The gene is linked to pyruvate kinase hyperactivity, pyruvate kinase deficiency of red cells.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.768

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000298.6. 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
	PKLR	NM_000298.6	MANE Select	c.1614A>C	p.Glu538Asp	missense	Exon 10 of 11	NP_000289.1	P30613-1
	PKLR	NM_181871.4		c.1521A>C	p.Glu507Asp	missense	Exon 10 of 11	NP_870986.1	P30613-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PKLR	ENST00000342741.6	TSL:1 MANE Select	c.1614A>C	p.Glu538Asp	missense	Exon 10 of 11	ENSP00000339933.4	P30613-1
	PKLR	ENST00000392414.7	TSL:1	c.1521A>C	p.Glu507Asp	missense	Exon 10 of 11	ENSP00000376214.3	P30613-2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Pathogenic	0.18	D
BayesDel_noAF	Uncertain	0.020
CADD	Benign	12
DANN	Benign	0.95
DEOGEN2	Uncertain	0.72	D
Eigen	Benign	-0.99
Eigen_PC	Benign	-0.89
FATHMM_MKL	Benign	0.30	N
M_CAP	Benign	0.080	D
MetaRNN	Pathogenic	0.77	D
MetaSVM	Benign	-0.31	T
MutationAssessor	Benign	0.36	N
PhyloP100		-0.26
PrimateAI	Benign	0.40	T
PROVEAN	Benign	-0.71	N
REVEL	Uncertain	0.53
Sift	Benign	0.40	T
Sift4G	Benign	0.55	T
Varity_R		0.30
gMVP		0.89
Mutation Taster		=90/10	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

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

Other links and lift over

hg19: chr1-155261551;