chr12-122054933-C-G

Variant names:

• chr12-122054933-C-G
• rs556323322
• ENST00000538010.5:c.568C>G

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_020993.5(BCL7A):​c.568C>G​(p.Arg190Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,884 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R190C) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: BCL7A NM_020993.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.0430
• Publications: 0 publications found

Genes affected

BCL7A (HGNC:1004): (BAF chromatin remodeling complex subunit BCL7A) This gene is directly involved, with Myc and IgH, in a three-way gene translocation in a Burkitt lymphoma cell line. As a result of the gene translocation, the N-terminal region of the gene product is disrupted, which is thought to be related to the pathogenesis of a subset of high-grade B cell non-Hodgkin lymphoma. The N-terminal segment involved in the translocation includes the region that shares a strong sequence similarity with those of BCL7B and BCL7C. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.051706642).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_020993.5. 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
	BCL7A	NM_001024808.3	MANE Select	c.561+7C>G		splice_region intron	N/A	NP_001019979.1	Q4VC05-1
	BCL7A	NM_020993.5		c.568C>G	p.Arg190Gly	missense	Exon 5 of 6	NP_066273.1	Q4VC05-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BCL7A	ENST00000538010.5	TSL:1	c.568C>G	p.Arg190Gly	missense	Exon 5 of 6	ENSP00000445868.1	Q4VC05-2
	BCL7A	ENST00000261822.5	TSL:1 MANE Select	c.561+7C>G		splice_region intron	N/A	ENSP00000261822.5	Q4VC05-1
	BCL7A	ENST00000918381.1		c.645+7C>G		splice_region intron	N/A	ENSP00000588440.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461884 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2 AN XY: 727240

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53418

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1112010

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.094
BayesDel_addAF	Benign	-0.25	T
BayesDel_noAF	Benign	-0.59
CADD	Benign	2.9
DANN	Benign	0.87
Eigen	Benign	-1.0
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.052	N
M_CAP	Benign	0.0084	T
MetaRNN	Benign	0.052	T
MetaSVM	Benign	-1.1	T
PhyloP100		-0.043
PrimateAI	Benign	0.34	T
PROVEAN	Benign	-0.72	N
REVEL	Benign	0.019
Sift	Benign	0.042	D
Sift4G	Benign	0.23	T
Polyphen		0.081	B
Vest4		0.15
MutPred		0.21		Gain of catalytic residue at R192 (P = 0.0037)
MVP		0.055
MPC		0.43
ClinPred		0.068	T
GERP RS		0.42
gMVP		0.13
Mutation Taster		=98/2	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: rs556323322; hg19: chr12-122492839;