6-26027182-C-G

Variant names:

• chr6-26027182-C-G
• rs746344147
• NM_003544.3:c.71G>C

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_003544.3(H4C2):​c.71G>C​(p.Arg24Pro) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R24Q) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: H4C2 NM_003544.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.66
• Publications: 0 publications found

Genes affected

H4C2 (HGNC:4789): (H4 clustered histone 2) 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]

LINC02980 (HGNC:56046): (long intergenic non-protein coding RNA 2980)

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.909

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003544.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	H4C2	NM_003544.3	MANE Select	c.71G>C	p.Arg24Pro	missense	Exon 1 of 1	NP_003535.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	H4C2	ENST00000377745.5	TSL:6 MANE Select	c.71G>C	p.Arg24Pro	missense	Exon 1 of 1	ENSP00000366974.2	P62805
	H4C2	ENST00000718258.1		c.71G>C	p.Arg24Pro	missense	Exon 1 of 1	ENSP00000520698.1	P62805
	LINC02980	ENST00000730122.1		n.203C>G		non_coding_transcript_exon	Exon 1 of 2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.47	D
BayesDel_noAF	Pathogenic	0.44
CADD	Uncertain	24
DANN	Uncertain	0.99
Eigen	Uncertain	0.29
Eigen_PC	Uncertain	0.29
FATHMM_MKL	Pathogenic	0.97	D
M_CAP	Benign	0.017	T
MetaRNN	Pathogenic	0.91	D
MetaSVM	Benign	-0.30	T
PhyloP100		7.7
PrimateAI	Pathogenic	0.90	D
PROVEAN	Pathogenic	-6.3	D
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.012	D
Vest4		0.95
MVP		0.081
ClinPred		1.0	D
GERP RS		4.7
PromoterAI		0.037	Neutral
gMVP		0.62
Mutation Taster		=55/45	polymorphism

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

Other links and lift over

dbSNP: rs746344147; hg19: chr6-26027410;