chr10-69395056-C-A

Variant names:

• chr10-69395056-C-A
• rs1054203
• NM_001358263.1:c.2338C>A

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_001358263.1(HK1):​c.2338C>A​(p.Leu780Met) 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 variant affecting the same amino acid position, but resulting in a different missense (i.e. L780P) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: HK1 NM_001358263.1 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.74
• Publications: 5 publications found

Genes affected

HK1 (HGNC:4922): (hexokinase 1) Hexokinases phosphorylate glucose to produce glucose-6-phosphate, the first step in most glucose metabolism pathways. This gene encodes a ubiquitous form of hexokinase which localizes to the outer membrane of mitochondria. Mutations in this gene have been associated with hemolytic anemia due to hexokinase deficiency. Alternative splicing of this gene results in several transcript variants which encode different isoforms, some of which are tissue-specific. [provided by RefSeq, Apr 2016]

HK1 Gene-Disease associations (from GenCC):

• neurodevelopmental disorder with visual defects and brain anomalies

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
• retinitis pigmentosa 79

  Inheritance: AD Classification: STRONG, MODERATE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
• non-spherocytic hemolytic anemia due to hexokinase deficiency

  Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics
• Charcot-Marie-Tooth disease type 4G

  Inheritance: AR Classification: SUPPORTIVE, LIMITED Submitted by: Orphanet, Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.829

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HK1	NM_001358263.1	c.2338C>A	p.Leu780Met	missense_variant	Exon 19 of 21	ENST00000643399.2	NP_001345192.1
HK1	NM_000188.3	c.2326C>A	p.Leu776Met	missense_variant	Exon 16 of 18	ENST00000359426.7	NP_000179.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HK1	ENST00000643399.2	c.2338C>A	p.Leu780Met	missense_variant	Exon 19 of 21		NM_001358263.1	ENSP00000494664.1
HK1	ENST00000359426.7	c.2326C>A	p.Leu776Met	missense_variant	Exon 16 of 18	1	NM_000188.3	ENSP00000352398.6

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.83
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Uncertain	0.10
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.54	.;.;.;.;.;D
Eigen	Uncertain	0.67
Eigen_PC	Uncertain	0.59
FATHMM_MKL	Uncertain	0.83	D
LIST_S2	Uncertain	0.97	.;D;D;.;D;D
M_CAP	Pathogenic	0.59	D
MetaRNN	Pathogenic	0.83	D;D;D;D;D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Pathogenic	3.2	.;.;.;.;.;M
PhyloP100		1.7
PrimateAI	Uncertain	0.68	T
PROVEAN	Benign	-1.6	.;.;N;.;N;N
REVEL	Pathogenic	0.76
Sift	Benign	0.036	.;.;D;.;D;D
Sift4G	Uncertain	0.015	.;D;D;.;D;D
Polyphen		1.0	D;D;D;D;D;D
Vest4		0.70, 0.69, 0.69, 0.70
MVP		0.79
ClinPred		0.96	D
GERP RS		4.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.56
gMVP		0.83
Mutation Taster		=56/44	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

Other links and lift over

dbSNP: rs1054203; hg19: chr10-71154812; COSMIC: COSV53856018;