NM_138694.4:c.5125C>G

Variant names:

• chr6-52024685-G-C
• rs45517932
• NM_138694.4:c.5125C>G

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1 PM2 PM5

The NM_138694.4(PKHD1):​c.5125C>G​(p.Leu1709Val) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. 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. L1709F) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PKHD1 NM_138694.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.54

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 Likely_pathogenic. Variant got 6 ACMG points.

• PM1: In a domain IPT/TIG 12; atypical (size 84) in uniprot entity PKHD1_HUMAN there are 8 pathogenic changes around while only 1 benign (89%) in NM_138694.4
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr6-52024685-G-A is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PKHD1	NM_138694.4	c.5125C>G	p.Leu1709Val	missense_variant	Exon 32 of 67	ENST00000371117.8	NP_619639.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PKHD1	ENST00000371117.8	c.5125C>G	p.Leu1709Val	missense_variant	Exon 32 of 67	1	NM_138694.4	ENSP00000360158.3
PKHD1	ENST00000340994.4	c.5125C>G	p.Leu1709Val	missense_variant	Exon 32 of 61	5		ENSP00000341097.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251342 Hom.: 0 AF XY: 0.00000736 AC XY: 1 AN XY: 135836

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

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: 0.00000880

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Uncertain	0.072	D
BayesDel_noAF	Benign	-0.13
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.30	T;.
Eigen	Uncertain	0.37
Eigen_PC	Uncertain	0.30
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Benign	0.82	T;T
M_CAP	Uncertain	0.11	D
MetaRNN	Uncertain	0.55	D;D
MetaSVM	Uncertain	0.17	D
MutationAssessor	Uncertain	2.8	M;M
PrimateAI	Benign	0.39	T
PROVEAN	Benign	-1.6	N;N
REVEL	Uncertain	0.47
Sift	Benign	0.14	T;T
Sift4G	Uncertain	0.051	T;T
Polyphen		0.99	D;P
Vest4		0.46
MutPred		0.52		Loss of sheet (P = 0.0457);Loss of sheet (P = 0.0457);
MVP		0.93
MPC		0.38
ClinPred		0.85	D
GERP RS		4.7
Varity_R		0.16
gMVP		0.33

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

LitVar

Other links and lift over

dbSNP: rs45517932; hg19: chr6-51889483;