17-3610720-C-G

Variant names:

• chr17-3610720-C-G
• rs781242643
• NM_013276.4:c.1277G>C

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_013276.4(SHPK):​c.1277G>C​(p.Arg426Thr) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,461,846 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. R426M) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: SHPK NM_013276.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.18
• Publications: 0 publications found

Genes affected

SHPK (HGNC:1492): (sedoheptulokinase) The protein encoded by this gene has weak homology to several carbohydrate kinases, a class of proteins involved in the phosphorylation of sugars as they enter a cell, inhibiting return across the cell membrane. Sequence variation between this novel gene and known carbohydrate kinases suggests the possibility of a different substrate, cofactor or changes in kinetic properties distinguishing it from other carbohydrate kinases. The gene resides in a region commonly deleted in cystinosis patients, suggesting a role as a modifier for the cystinosis phenotype. The genomic region is also rich in Alu repetitive sequences, frequently involved in chromosomal rearrangements. [provided by RefSeq, Jul 2008]

SHPK Gene-Disease associations (from GenCC):

• isolated sedoheptulokinase deficiency

  Inheritance: AR, Unknown Classification: MODERATE, SUPPORTIVE, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), PanelApp Australia, Orphanet

ENSG00000262304 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_013276.4. 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
	SHPK	NM_013276.4	MANE Select	c.1277G>C	p.Arg426Thr	missense	Exon 7 of 7	NP_037408.2	Q9UHJ6

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SHPK	ENST00000225519.5	TSL:1 MANE Select	c.1277G>C	p.Arg426Thr	missense	Exon 7 of 7	ENSP00000225519.3	Q9UHJ6
	ENSG00000262304	ENST00000572919.1	TSL:5	n.1277G>C		non_coding_transcript_exon	Exon 7 of 14	ENSP00000461416.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.0000119 AC: 3 AN: 251250 AF XY: 0.00000736

Gnomad AFR exome AF: 0.000185

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461846 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727228

African (AFR) AF: 0.0000896 AC: 3 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53378

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1112008

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ExAC AF: 0.0000247 AC: 3

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.27
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.11
CADD	Benign	21
DANN	Benign	0.96
Eigen	Benign	-0.0083
Eigen_PC	Benign	0.021
FATHMM_MKL	Uncertain	0.91	D
M_CAP	Benign	0.016	T
MetaRNN	Uncertain	0.46	T
MetaSVM	Benign	-1.1	T
PhyloP100		5.2
PrimateAI	Uncertain	0.61	T
PROVEAN	Uncertain	-2.5	D
REVEL	Benign	0.17
Sift	Uncertain	0.012	D
Sift4G	Uncertain	0.012	D
Vest4		0.71
MutPred		0.41		Loss of MoRF binding (P = 0.101)
MVP		0.31
MPC		0.96
ClinPred		0.63	D
GERP RS		4.7
gMVP		0.73

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs781242643; hg19: chr17-3514014;