Genetic Variant NM_003547.3:c.151A>G (chr6-26246827-T-C) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_003547.3(H4C7):c.151A>G(p.Ile51Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000818 in 1,614,152 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000053 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000085 ( 0 hom. )

Consequence

H4C7
NM_003547.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.36

Variant links:

Genes affected

H4C7 (HGNC:4792): (H4 clustered histone 7) Histones are basic nuclear proteins that are responsible for the nucleosome structure of the chromosomal fiber in eukaryotes. Two molecules of each of the four core histones (H2A, H2B, H3, and H4) form an octamer, around which approximately 146 bp of DNA is wrapped in repeating units, called nucleosomes. The linker histone, H1, interacts with linker DNA between nucleosomes and functions in the compaction of chromatin into higher order structures. This gene is intronless and encodes a replication-dependent histone that is a member of the histone H4 family. Transcripts from this gene lack polyA tails but instead contain a palindromic termination element. This gene is found in the large histone gene cluster on chromosome 6. [provided by RefSeq, Aug 2015]

H4C7 links:

ENSG00000291336 (HGNC:):

ENSG00000291336 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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 rank	MANE	Protein	UniProt
H4C7	NM_003547.3 link	c.151A>G	p.Ile51Val	missense_variant	Exon 1 of 1	ENST00000611444.2	NP_003538.1	Q99525

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
H4C7	ENST00000611444.2 link	c.151A>G	p.Ile51Val	missense_variant	Exon 1 of 1	6	NM_003547.3	ENSP00000477870.2	Q99525
ENSG00000291336	ENST00000707189.1 link	n.999+122656T>C		intron_variant	Intron 1 of 1
ENSG00000291338	ENST00000707191.1 link	n.1000+88706T>C		intron_variant	Intron 1 of 1

Frequencies

GnomAD3 genomes

AF:

0.0000526

AC:

AN:

152146

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.0000942

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.000956

GnomAD3 exomes

AF:

0.000115

AC:

AN:

251394

Hom.:

AF XY:

0.000118

AC XY:

AN XY:

135894

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000116

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.000158

Gnomad OTH exome

AF:

0.000978

GnomAD4 exome

AF:

0.0000848

AC:

124

AN:

1461888

Hom.:

Cov.:

AF XY:

0.0000921

AC XY:

AN XY:

727242

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.000134

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.0000374

Gnomad4 NFE exome

AF:

0.0000755

Gnomad4 OTH exome

AF:

0.000182

GnomAD4 genome

AF:

0.0000525

AC:

AN:

152264

Hom.:

Cov.:

AF XY:

0.0000940

AC XY:

AN XY:

74462

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000942

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.000946

Alfa

AF:

0.000270

Hom.:

Bravo

AF:

0.0000756

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000988

AC:

EpiCase

AF:

0.000218

EpiControl

AF:

0.000296

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 07, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.151A>G (p.I51V) alteration is located in exon 1 (coding exon 1) of the HIST1H4G gene. This alteration results from a A to G substitution at nucleotide position 151, causing the isoleucine (I) at amino acid position 51 to be replaced by a valine (V). 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

0.11

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Benign

-0.22

CADD

Benign

DANN

Benign

0.65

DEOGEN2

Benign

0.041

Eigen

Benign

0.061

Eigen_PC

Benign

0.022

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.89

M_CAP

Benign

0.0056

MetaRNN

Uncertain

0.61

MetaSVM

Benign

-0.79

PrimateAI

Uncertain

0.78

Sift4G

Benign

0.20

Polyphen

0.55

Vest4

0.69

MVP

0.33

ClinPred

0.55

GERP RS

3.2

Varity_R

0.038

gMVP

0.71

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

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