16-2090322-C-T

Variant names:

• chr16-2090322-C-T
• rs768391524
• NM_001009944.3:c.12407G>A

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PM5

The NM_001009944.3(PKD1):​c.12407G>A​(p.Arg4136Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,459,582 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R4136T) has been classified as Likely pathogenic.

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: PKD1 NM_001009944.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.25
• Publications: 0 publications found

Genes affected

PKD1 (HGNC:9008): (polycystin 1, transient receptor potential channel interacting) This gene encodes a member of the polycystin protein family. The encoded glycoprotein contains a large N-terminal extracellular region, multiple transmembrane domains and a cytoplasmic C-tail. It is an integral membrane protein that functions as a regulator of calcium permeable cation channels and intracellular calcium homoeostasis. It is also involved in cell-cell/matrix interactions and may modulate G-protein-coupled signal-transduction pathways. It plays a role in renal tubular development, and mutations in this gene cause autosomal dominant polycystic kidney disease type 1 (ADPKD1). ADPKD1 is characterized by the growth of fluid-filled cysts that replace normal renal tissue and result in end-stage renal failure. Splice variants encoding different isoforms have been noted for this gene. Also, six pseudogenes, closely linked in a known duplicated region on chromosome 16p, have been described. [provided by RefSeq, Oct 2008]

MIR1225 (HGNC:33931): (microRNA 1225) microRNAs (miRNAs) are short (20-24 nt) non-coding RNAs that are involved in post-transcriptional regulation of gene expression in multicellular organisms by affecting both the stability and translation of mRNAs. miRNAs are transcribed by RNA polymerase II as part of capped and polyadenylated primary transcripts (pri-miRNAs) that can be either protein-coding or non-coding. The primary transcript is cleaved by the Drosha ribonuclease III enzyme to produce an approximately 70-nt stem-loop precursor miRNA (pre-miRNA), which is further cleaved by the cytoplasmic Dicer ribonuclease to generate the mature miRNA and antisense miRNA star (miRNA*) products. The mature miRNA is incorporated into a RNA-induced silencing complex (RISC), which recognizes target mRNAs through imperfect base pairing with the miRNA and most commonly results in translational inhibition or destabilization of the target mRNA. The RefSeq represents the predicted microRNA stem-loop. [provided by RefSeq, Sep 2009]

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr16-2090322-C-G is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 3032639.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001009944.3. 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
	PKD1	NM_001009944.3	MANE Select	c.12407G>A	p.Arg4136Lys	missense	Exon 45 of 46	NP_001009944.3	P98161-1
	PKD1	NM_000296.4		c.12404G>A	p.Arg4135Lys	missense	Exon 45 of 46	NP_000287.4
	MIR1225	NR_030646.1		n.-38G>A		upstream_gene	N/A

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PKD1	ENST00000262304.9	TSL:1 MANE Select	c.12407G>A	p.Arg4136Lys	missense	Exon 45 of 46	ENSP00000262304.4	P98161-1
	PKD1	ENST00000423118.5	TSL:1	c.12404G>A	p.Arg4135Lys	missense	Exon 45 of 46	ENSP00000399501.1	P98161-3
	PKD1	ENST00000472577.1	TSL:2	n.435G>A		non_coding_transcript_exon	Exon 2 of 3

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1459582 Hom.: 0 Cov.: 34 AF XY: 0.00 AC XY: 0 AN XY: 725954

African (AFR) AF: 0.00 AC: 0 AN: 33452

American (AMR) AF: 0.00 AC: 0 AN: 44670

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26090

East Asian (EAS) AF: 0.00 AC: 0 AN: 39674

South Asian (SAS) AF: 0.00 AC: 0 AN: 86214

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52000

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

European-Non Finnish (NFE) AF: 9.00e-7 AC: 1 AN: 1111386

Other (OTH) AF: 0.00 AC: 0 AN: 60328

GnomAD4 genome Cov.: 34

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.70
BayesDel_addAF	Uncertain	0.061	T
BayesDel_noAF	Benign	-0.15
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Benign	0.25	T
Eigen	Uncertain	0.62
Eigen_PC	Uncertain	0.52
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Benign	0.78	T
M_CAP	Uncertain	0.25	D
MetaRNN	Uncertain	0.69	D
MetaSVM	Uncertain	-0.22	T
MutationAssessor	Uncertain	2.8	M
PhyloP100		7.2
PrimateAI	Uncertain	0.78	T
PROVEAN	Benign	-1.7	N
REVEL	Uncertain	0.39
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.63
MutPred		0.46		Gain of methylation at R4136 (P = 0.0193)
MVP		0.88
ClinPred		0.99	D
GERP RS		4.0
Varity_R		0.54
gMVP		0.84
Mutation Taster		=33/67	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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: rs768391524; hg19: chr16-2140323;