chr12-6967713-A-G

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 3P and 4B. PM1PP3BS2

The NM_001144831.2(PHB2):c.674T>C(p.Ile225Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000062 in 1,613,696 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000062 ( 0 hom. )

Consequence

PHB2
NM_001144831.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 9.07

Variant links:

Genes affected

PHB2 (HGNC:30306): (prohibitin 2) Enables several functions, including protein C-terminus binding activity; protein N-terminus binding activity; and protein dimerization activity. Involved in several processes, including defense response to virus; positive regulation of cell cycle phase transition; and regulation of transcription, DNA-templated. Located in several cellular components, including cell surface; mitochondrial membrane; and nuclear matrix. Part of mitochondrial prohibitin complex. [provided by Alliance of Genome Resources, Apr 2022]

PHB2 links:

SCARNA12 (HGNC:32569): (small Cajal body-specific RNA 12) This gene produces a small nuclear RNA that localizes specifically to Cajal bodies, which are conserved subnuclear organelles that are present in the nucleoplasm. This RNA is processed from an intron of the prohibitin 2 host gene. It includes both an H/ACA box and a C/D box, and is thought to guide the pseudouridylation of residue U46 in the U5 small nuclear RNA. [provided by RefSeq, Jun 2010]

SCARNA12 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -1 ACMG points.

PM1

In a mutagenesis_site Reduces helicity. Decreases homodimerization and interaction with PHB. Disrupts mitochondrial dynamics. Disrupts mitochondrial-mediated antiviral innate immune response. (size 0) in uniprot entity PHB2_HUMAN

PP3

MetaRNN computational evidence supports a deleterious effect, 0.812

BS2

High AC in GnomAdExome4 at 9 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PHB2	NM_001144831.2 link	c.674T>C	p.Ile225Thr	missense_variant	Exon 6 of 10	ENST00000535923.6	NP_001138303.1	Q99623-1
PHB2	NM_001267700.1 link	c.607+179T>C		intron_variant	Intron 5 of 8		NP_001254629.1	Q99623-2
PHB2	XM_047428234.1 link	c.607+179T>C		intron_variant	Intron 5 of 5		XP_047284190.1
SCARNA12	NR_003010.1 link	n.-107T>C		upstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PHB2	ENST00000535923.6 link	c.674T>C	p.Ile225Thr	missense_variant	Exon 6 of 10	5	NM_001144831.2	ENSP00000441875.1		Q99623-1

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

152064

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000120

AC:

AN:

249154

Hom.:

AF XY:

0.0000148

AC XY:

AN XY:

135172

show subpopulations

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:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000177

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000616

AC:

AN:

1461632

Hom.:

Cov.:

AF XY:

0.00000963

AC XY:

AN XY:

727104

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000450

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.00000658

AC:

AN:

152064

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74254

show subpopulations

Gnomad4 AFR

AF:

0.00

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:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000312

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.0000248

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 14, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.674T>C (p.I225T) alteration is located in exon 6 (coding exon 6) of the PHB2 gene. This alteration results from a T to C substitution at nucleotide position 674, causing the isoleucine (I) at amino acid position 225 to be replaced by a threonine (T). 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

0.83

BayesDel_addAF

Pathogenic

0.39

BayesDel_noAF

Pathogenic

0.41

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.60

D;T;T;T

Eigen

Uncertain

0.29

Eigen_PC

Uncertain

0.26

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.88

D;D;D;D

M_CAP

Pathogenic

0.43

MetaRNN

Pathogenic

0.75

D;D;D;D

MetaSVM

Uncertain

0.066

MutationAssessor

Pathogenic

3.8

H;.;.;.

PrimateAI

Pathogenic

0.88

PROVEAN

Uncertain

-4.3

D;D;D;D

REVEL

Uncertain

0.47

Sift

Pathogenic

0.0

D;D;D;D

Sift4G

Uncertain

0.026

D;D;D;.

Polyphen

0.29

B;.;.;.

Vest4

0.84

MutPred

0.47

Gain of phosphorylation at I225 (P = 0.0389);Gain of phosphorylation at I225 (P = 0.0389);Gain of phosphorylation at I225 (P = 0.0389);.;

MVP

0.69

MPC

1.9

ClinPred

1.0

GERP RS

3.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.90

gMVP

0.83

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.12

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