Genetic Variant PHRF1:p.Pro27Ser (chr11-581591-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001286581.2(PHRF1):c.79C>T(p.Pro27Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000167 in 1,612,758 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000055 ( 0 hom. )

Consequence

PHRF1
NM_001286581.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.0950

Variant links:

Genes affected

PHRF1 (HGNC:24351): (PHD and ring finger domains 1) Predicted to enable RNA polymerase binding activity. Predicted to be involved in mRNA processing and transcription by RNA polymerase II. Located in membrane. [provided by Alliance of Genome Resources, Apr 2022]

PHRF1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.019316733).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PHRF1	NM_001286581.2 link	c.79C>T	p.Pro27Ser	missense_variant	Exon 2 of 18	ENST00000264555.10	NP_001273510.1	Q9P1Y6-1A0A024RCA1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PHRF1	ENST00000264555.10 link	c.79C>T	p.Pro27Ser	missense_variant	Exon 2 of 18	1	NM_001286581.2	ENSP00000264555.5		Q9P1Y6-1

Frequencies

GnomAD3 genomes

AF:

0.000125

AC:

AN:

152150

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000458

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000163

AC:

AN:

245906

Hom.:

AF XY:

0.00000745

AC XY:

AN XY:

134216

show subpopulations

Gnomad AFR exome

AF:

0.000263

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000548

AC:

AN:

1460490

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

726516

show subpopulations

Gnomad4 AFR exome

AF:

0.000239

Gnomad4 AMR exome

AF:

0.00

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

AF:

0.000125

AC:

AN:

152268

Hom.:

Cov.:

AF XY:

0.000134

AC XY:

AN XY:

74470

show subpopulations

Gnomad4 AFR

AF:

0.000457

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000329

Hom.:

Bravo

AF:

0.000212

ExAC

AF:

0.00000828

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Feb 20, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.79C>T (p.P27S) alteration is located in exon 2 (coding exon 1) of the PHRF1 gene. This alteration results from a C to T substitution at nucleotide position 79, causing the proline (P) at amino acid position 27 to be replaced by a serine (S). 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

Benign

0.074

BayesDel_addAF

Benign

-0.44

BayesDel_noAF

Benign

-0.52

CADD

Benign

DANN

Benign

0.89

DEOGEN2

Benign

0.013

T;.;T;.

Eigen

Benign

-1.4

Eigen_PC

Benign

-1.4

FATHMM_MKL

Benign

0.14

LIST_S2

Benign

0.64

T;T;T;T

M_CAP

Benign

0.030

MetaRNN

Benign

0.019

T;T;T;T

MetaSVM

Benign

-0.98

MutationAssessor

Benign

0.34

N;.;.;N

PrimateAI

Benign

0.32

PROVEAN

Benign

0.64

N;N;N;N

REVEL

Benign

0.12

Sift

Benign

0.14

T;T;T;T

Sift4G

Benign

0.71

T;T;T;T

Polyphen

0.012

B;B;B;B

Vest4

0.15

MVP

0.13

MPC

0.10

ClinPred

0.0098

GERP RS

0.32

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.026

gMVP

0.059

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.070

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over