NM_000293.3:c.16G>C

Variant names:

• chr16-47461366-G-C
• NM_000293.3:c.16G>C

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_000293.3(PHKB):​c.16G>C​(p.Gly6Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,459,300 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: PHKB NM_000293.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.49

Genes affected

PHKB (HGNC:8927): (phosphorylase kinase regulatory subunit beta) Phosphorylase kinase is a polymer of 16 subunits, four each of alpha, beta, gamma and delta. The alpha subunit includes the skeletal muscle and hepatic isoforms, encoded by two different genes. The beta subunit is the same in both the muscle and hepatic isoforms, encoded by this gene, which is a member of the phosphorylase b kinase regulatory subunit family. The gamma subunit also includes the skeletal muscle and hepatic isoforms, encoded by two different genes. The delta subunit is a calmodulin and can be encoded by three different genes. The gamma subunits contain the active site of the enzyme, whereas the alpha and beta subunits have regulatory functions controlled by phosphorylation. The delta subunit mediates the dependence of the enzyme on calcium concentration. Mutations in this gene cause glycogen storage disease type 9B, also known as phosphorylase kinase deficiency of liver and muscle. Alternatively spliced transcript variants encoding different isoforms have been identified in this gene. Two pseudogenes have been found on chromosomes 14 and 20, respectively.[provided by RefSeq, Feb 2010]

ITFG1 (HGNC:30697): (integrin alpha FG-GAP repeat containing 1) Located in extracellular exosome. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

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

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PHKB	NM_000293.3	c.16G>C	p.Gly6Arg	missense_variant	Exon 1 of 31	ENST00000323584.10	NP_000284.1
PHKB	NM_001363837.1	c.16G>C	p.Gly6Arg	missense_variant	Exon 1 of 31		NP_001350766.1
PHKB	NM_001031835.3	c.-118G>C		5_prime_UTR_variant	Exon 1 of 32		NP_001027005.1
ITFG1	NM_001305002.2	c.-383C>G		upstream_gene_variant			NP_001291931.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PHKB	ENST00000323584.10	c.16G>C	p.Gly6Arg	missense_variant	Exon 1 of 31	1	NM_000293.3	ENSP00000313504.5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1459300 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 725974

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.36
BayesDel_addAF	Uncertain	0.088	D
BayesDel_noAF	Benign	-0.11
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.032	.;T
Eigen	Benign	-0.52
Eigen_PC	Benign	-0.42
FATHMM_MKL	Benign	0.45	N
LIST_S2	Benign	0.69	T;T
M_CAP	Benign	0.069	D
MetaRNN	Uncertain	0.49	T;T
MetaSVM	Benign	-0.33	T
MutationAssessor	Benign	0.90	L;L
PrimateAI	Uncertain	0.79	T
PROVEAN	Benign	0.11	N;N
REVEL	Uncertain	0.29
Sift	Uncertain	0.0090	D;D
Sift4G	Uncertain	0.022	D;D
Polyphen		0.029	.;B
Vest4		0.54
MutPred		0.49		Gain of MoRF binding (P = 0);Gain of MoRF binding (P = 0);
MVP		0.82
MPC		0.15
ClinPred		0.65	D
GERP RS		3.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.13
gMVP		0.54

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr16-47495277;