17-75778641-G-C

Position:

• chr17-75778641-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM1 PM2 PP5

The NM_005324.5(H3-3B):​c.365C>G​(p.Pro122Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: H3-3B NM_005324.5 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 9.79

Genes affected

H3-3B (HGNC:4765): (H3.3 histone B) 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 contains introns and its mRNA is polyadenylated, unlike most histone genes. The protein encoded by this gene is a replication-independent histone that is a member of the histone H3 family. Pseudogenes of this gene have been identified on the X chromosome, and on chromosomes 5, 13 and 17. [provided by RefSeq, Oct 2015]

H3-3B (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 5 ACMG points.

• PM1: In a chain Histone H3.3 (size 134) in uniprot entity H33_HUMAN there are 14 pathogenic changes around while only 0 benign (100%) in NM_005324.5
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 17-75778641-G-C is Pathogenic according to our data. Variant chr17-75778641-G-C is described in ClinVar as [Pathogenic]. Clinvar id is 1339274.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr17-75778641-G-C is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
H3-3B	NM_005324.5	c.365C>G	p.Pro122Arg	missense_variant	4/4	ENST00000254810.8	NP_005315.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
H3-3B	ENST00000254810.8	c.365C>G	p.Pro122Arg	missense_variant	4/4	1	NM_005324.5	ENSP00000254810.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Bryant-Li-Bhoj neurodevelopmental syndrome 2 Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Feb 02, 2022

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.97
BayesDel_addAF	Uncertain	0.087	D
BayesDel_noAF	Pathogenic	0.26
CADD	Pathogenic	32
DANN	Uncertain	0.99
DEOGEN2	Benign	0.011	T;.
Eigen	Uncertain	0.36
Eigen_PC	Uncertain	0.40
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Benign	0.54	T;T
M_CAP	Uncertain	0.086	D
MetaRNN	Uncertain	0.53	D;D
Sift4G	Uncertain	0.041	D;.
Vest4		0.68
MVP		0.82
ClinPred		1.0	D
GERP RS		4.3

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr17-73774722;