1-226368315-A-G

Variant summary

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

The NM_001618.4(PARP1):c.2161T>C(p.Ser721Pro) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: PARP1 NM_001618.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.58

Genes affected

PARP1 (HGNC:270): (poly(ADP-ribose) polymerase 1) This gene encodes a chromatin-associated enzyme, poly(ADP-ribosyl)transferase, which modifies various nuclear proteins by poly(ADP-ribosyl)ation. The modification is dependent on DNA and is involved in the regulation of various important cellular processes such as differentiation, proliferation, and tumor transformation and also in the regulation of the molecular events involved in the recovery of cell from DNA damage. In addition, this enzyme may be the site of mutation in Fanconi anemia, and may participate in the pathophysiology of type I diabetes. [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
PARP1	NM_001618.4	c.2161T>C	p.Ser721Pro	missense_variant	16/23	ENST00000366794.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PARP1	ENST00000366794.10	c.2161T>C	p.Ser721Pro	missense_variant	16/23	1	NM_001618.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 26, 2023

The c.2161T>C (p.S721P) alteration is located in exon 16 (coding exon 16) of the PARP1 gene. This alteration results from a T to C substitution at nucleotide position 2161, causing the serine (S) at amino acid position 721 to be replaced by a proline (P). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.57
BayesDel_addAF	Benign	-0.0015	T
BayesDel_noAF	Benign	-0.24
Cadd	Uncertain	24
Dann	Uncertain	1.0
DEOGEN2	Benign	0.24	T
Eigen	Benign	0.023
Eigen_PC	Benign	0.18
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.83	T
M_CAP	Benign	0.013	T
MetaRNN	Uncertain	0.66	D
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.4	L
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.69	T
PROVEAN	Uncertain	-2.4	N
REVEL	Benign	0.11
Sift	Benign	0.045	D
Sift4G	Benign	0.18	T
Polyphen		0.049	B
Vest4		0.66
MutPred		0.48		Loss of phosphorylation at S721 (P = 0.0423);
MVP		0.77
MPC		0.29
ClinPred		0.78	D
GERP RS		5.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.8
Varity_R		0.95
gMVP		0.66

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: rs1664313584; hg19: chr1-226556016;