rs139555370

chr6-51847940-C-Gchr6-51847940-C-T

Variant summary

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

The NM_138694.4(PKHD1):c.7942G>C(p.Gly2648Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,754 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. G2648S) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: PKHD1 NM_138694.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.62

Genes affected

PKHD1 (HGNC:9016): (PKHD1 ciliary IPT domain containing fibrocystin/polyductin) The protein encoded by this gene is predicted to have a single transmembrane (TM)-spanning domain and multiple copies of an immunoglobulin-like plexin-transcription-factor domain. Alternative splicing results in two transcript variants encoding different isoforms. Other alternatively spliced transcripts have been described, but the full length sequences have not been determined. Several of these transcripts are predicted to encode truncated products which lack the TM and may be secreted. Mutations in this gene cause autosomal recessive polycystic kidney disease, also known as polycystic kidney and hepatic disease-1. [provided by RefSeq, Jul 2008]

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/exons	MANE	UniProt
PKHD1	NM_138694.4	c.7942G>C	p.Gly2648Arg	missense_variant	50/67	ENST00000371117.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PKHD1	ENST00000371117.8	c.7942G>C	p.Gly2648Arg	missense_variant	50/67	1	NM_138694.4	P2
PKHD1	ENST00000340994.4	c.7942G>C	p.Gly2648Arg	missense_variant	50/61	5		A2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251260 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135782

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS 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: 6.84e-7 AC: 1 AN: 1461754 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727204

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

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	Benign	0.18
BayesDel_addAF	Uncertain	0.076	D
BayesDel_noAF	Uncertain	-0.050
Cadd	Benign	23
Dann	Uncertain	1.0
DEOGEN2	Uncertain	0.62	D;.
Eigen	Uncertain	0.25
Eigen_PC	Benign	0.18
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Benign	0.75	T;T
M_CAP	Uncertain	0.13	D
MetaRNN	Uncertain	0.54	D;D
MetaSVM	Uncertain	0.13	D
MutationAssessor	Uncertain	2.2	M;M
MutationTaster	Benign	0.93	D;D
PrimateAI	Uncertain	0.53	T
PROVEAN	Uncertain	-3.8	D;D
REVEL	Uncertain	0.46
Sift	Uncertain	0.021	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;D
Vest4		0.41
MutPred		0.54		Gain of sheet (P = 0.0266);Gain of sheet (P = 0.0266);
MVP		0.93
MPC		0.18
ClinPred		0.94	D
GERP RS		5.5
Varity_R		0.34
gMVP		0.70

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

Publications

LitVar

Other links and lift over

dbSNP: rs139555370; hg19: chr6-51712738;