12-8938016-G-A

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_004426.3(PHC1):c.2816G>A(p.Arg939His) variant causes a missense change. The variant allele was found at a frequency of 0.00015 in 1,608,018 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00017 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00015 ( 0 hom. )

Consequence

PHC1
NM_004426.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 6.16

Publications

1 publications found

Variant links:

Genes affected

PHC1 (HGNC:3182): (polyhomeotic homolog 1) This gene is a homolog of the Drosophila polyhomeotic gene, which is a member of the Polycomb group of genes. The gene product is a component of a multimeric protein complex that contains EDR2 and the vertebrate Polycomb protein BMH1. The gene product, the EDR2 protein, and the Drosophila polyhomeotic protein share 2 highly conserved domains, named homology domains I and II. These domains are involved in protein-protein interactions and may mediate heterodimerization of the protein encoded by this gene and the EDR2 protein. [provided by RefSeq, Jul 2008]

PHC1 Gene-Disease associations (from GenCC):

autosomal recessive primary microcephaly
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
microcephaly 11, primary, autosomal recessive
Inheritance: AR Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P

PHC1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.020297617).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004426.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
PHC1	NM_004426.3	MANE Select	c.2816G>A	p.Arg939His	missense	Exon 14 of 15	NP_004417.2
PHC1	NM_001413738.1		c.2816G>A	p.Arg939His	missense	Exon 14 of 15	NP_001400667.1
PHC1	NM_001413739.1		c.2810G>A	p.Arg937His	missense	Exon 14 of 15	NP_001400668.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
PHC1	ENST00000544916.6	TSL:1 MANE Select	c.2816G>A	p.Arg939His	missense	Exon 14 of 15	ENSP00000437659.1
PHC1	ENST00000543824.5	TSL:1	c.2816G>A	p.Arg939His	missense	Exon 15 of 16	ENSP00000440674.1
PHC1	ENST00000433083.6	TSL:1	c.2681G>A	p.Arg894His	missense	Exon 13 of 14	ENSP00000399194.2

Frequencies

GnomAD3 genomes

AF:

0.000171

AC:

AN:

152200

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000720

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:

0.000147

Gnomad OTH

AF:

0.00191

GnomAD2 exomes

AF:

0.000265

AC:

AN:

248816

AF XY:

0.000246

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00117

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000548

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000204

Gnomad OTH exome

AF:

0.000329

GnomAD4 exome

AF:

0.000148

AC:

216

AN:

1455700

Hom.:

Cov.:

AF XY:

0.000131

AC XY:

AN XY:

724240

show subpopulations

African (AFR)

AF:

0.0000300

AC:

AN:

33342

American (AMR)

AF:

0.00122

AC:

AN:

44416

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26060

East Asian (EAS)

AF:

0.00

AC:

AN:

39638

South Asian (SAS)

AF:

0.00

AC:

AN:

85762

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53306

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5760

European-Non Finnish (NFE)

AF:

0.000135

AC:

150

AN:

1107204

Other (OTH)

AF:

0.000183

AC:

AN:

60212

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.490

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000171

AC:

AN:

152318

Hom.:

Cov.:

AF XY:

0.000134

AC XY:

AN XY:

74480

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41574

American (AMR)

AF:

0.000719

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5188

South Asian (SAS)

AF:

0.00

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10614

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000147

AC:

AN:

68024

Other (OTH)

AF:

0.00189

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000197

Hom.:

Bravo

AF:

0.000185

ExAC

AF:

0.000255

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:2

Aug 08, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.2816G>A (p.R939H) alteration is located in exon 14 (coding exon 13) of the PHC1 gene. This alteration results from a G to A substitution at nucleotide position 2816, causing the arginine (R) at amino acid position 939 to be replaced by a histidine (H). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear.

Apr 10, 2017

Genetic Services Laboratory, University of Chicago

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.25

BayesDel_addAF

Benign

-0.41

BayesDel_noAF

Benign

-0.41

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.14

Eigen

Benign

0.084

Eigen_PC

Benign

0.22

FATHMM_MKL

Uncertain

0.79

LIST_S2

Uncertain

0.92

M_CAP

Benign

0.0056

MetaRNN

Benign

0.020

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.64

PhyloP100

6.2

PrimateAI

Benign

0.40

PROVEAN

Benign

-1.7

REVEL

Benign

0.094

Sift

Benign

0.13

Sift4G

Benign

0.13

Polyphen

0.50

Vest4

0.23

MVP

0.30

MPC

1.9

ClinPred

0.081

GERP RS

4.4

Varity_R

0.086

gMVP

0.28

Mutation Taster

=83/17

polymorphism

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over