chr1-149884800-C-T

Position:

• chr1-149884800-C-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_003528.3(H2BC21):​c.*1460G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0477 in 152,252 control chromosomes in the GnomAD database, including 240 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.048 (240 hom., cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: H2BC21 NM_003528.3 3_prime_UTR
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0520

Genes affected

H2BC21 (HGNC:4760): (H2B clustered histone 21) 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 encodes a replication-dependent histone that is a member of the histone H2B family, and generates two transcripts through the use of the conserved stem-loop termination motif, and the polyA addition motif. The protein has antibacterial and antifungal antimicrobial activity. [provided by RefSeq, Aug 2015]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.74).
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.0734 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
H2BC21	NM_003528.3	c.*1460G>A		3_prime_UTR_variant	1/1	ENST00000369155.4	NP_003519.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
H2BC21	ENST00000369155.4	c.*1460G>A		3_prime_UTR_variant	1/1		NM_003528.3	ENSP00000358151	P1

Frequencies

GnomAD3 genomes AF: 0.0477 AC: 7256 AN: 152134 Hom.: 240 Cov.: 32

Gnomad AFR AF: 0.0132

Gnomad AMI AF: 0.0363

Gnomad AMR AF: 0.0310

Gnomad ASJ AF: 0.0706

Gnomad EAS AF: 0.000192

Gnomad SAS AF: 0.00952

Gnomad FIN AF: 0.0668

Gnomad MID AF: 0.0190

Gnomad NFE AF: 0.0751

Gnomad OTH AF: 0.0415

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 2 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 2

Gnomad4 NFE exome AF: 0.00

GnomAD4 genome AF: 0.0477 AC: 7256 AN: 152252 Hom.: 240 Cov.: 32 AF XY: 0.0460 AC XY: 3423 AN XY: 74462

Gnomad4 AFR AF: 0.0131

Gnomad4 AMR AF: 0.0310

Gnomad4 ASJ AF: 0.0706

Gnomad4 EAS AF: 0.000193

Gnomad4 SAS AF: 0.00994

Gnomad4 FIN AF: 0.0668

Gnomad4 NFE AF: 0.0751

Gnomad4 OTH AF: 0.0411

Alfa AF: 0.0654 Hom.: 232

Bravo AF: 0.0439

Asia WGS AF: 0.00549 AC: 20 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.74
CADD	Benign	5.7
DANN	Benign	0.74

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

Other links and lift over

dbSNP: rs15931; hg19: chr1-149856350;