chr6-31900393-G-A

Variant names:

• chr6-31900393-G-A
• rs1767119165
• NM_181842.3:c.913C>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_181842.3(ZBTB12):​c.913C>T​(p.Arg305Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000113 in 1,152,550 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000011 (0 hom.)
• Consequence: ZBTB12 NM_181842.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.29
• Publications: 0 publications found

Genes affected

ZBTB12 (HGNC:19066): (zinc finger and BTB domain containing 12) Enables sequence-specific double-stranded DNA binding activity. Predicted to be involved in regulation of transcription by RNA polymerase II. Located in nucleoplasm. [provided by Alliance of Genome Resources, Apr 2022]

C2 (HGNC:1248): (complement C2) Component C2 is a serum glycoprotein that functions as part of the classical pathway of the complement system. Activated C1 cleaves C2 into C2a and C2b. The serine proteinase C2a then combines with complement factor 4b to create the C3 or C5 convertase. Deficiency of C2 has been reported to associated with certain autoimmune diseases and SNPs in this gene have been associated with altered susceptibility to age-related macular degeneration. This gene localizes within the class III region of the MHC on the short arm of chromosome 6. Alternative splicing results in multiple transcript variants encoding distinct isoforms. Additional transcript variants have been described in publications but their full-length sequence has not been determined.[provided by RefSeq, Mar 2009]

C2 Gene-Disease associations (from GenCC):

• complement component 2 deficiency

  Inheritance: AR Classification: STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.1688093).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ZBTB12	NM_181842.3	c.913C>T	p.Arg305Trp	missense_variant	Exon 2 of 2	ENST00000375527.3	NP_862825.1
C2	NM_001282457.2	c.-64+2451G>A		intron_variant	Intron 1 of 13		NP_001269386.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ZBTB12	ENST00000375527.3	c.913C>T	p.Arg305Trp	missense_variant	Exon 2 of 2	1	NM_181842.3	ENSP00000364677.2
C2	ENST00000695637.1	c.-360+2118G>A		intron_variant	Intron 1 of 17			ENSP00000512074.1
C2	ENST00000497706.6	c.-64+2451G>A		intron_variant	Intron 1 of 14	5		ENSP00000417482.2
C2	ENST00000469372.5	c.-64+2451G>A		intron_variant	Intron 1 of 13	2		ENSP00000418923.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.0000113 AC: 13 AN: 1152550 Hom.: 0 Cov.: 52 AF XY: 0.0000106 AC XY: 6 AN XY: 565836

African (AFR) AF: 0.00 AC: 0 AN: 25122

American (AMR) AF: 0.0000329 AC: 1 AN: 30396

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 18466

East Asian (EAS) AF: 0.00 AC: 0 AN: 23452

South Asian (SAS) AF: 0.00 AC: 0 AN: 75382

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 30152

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3086

European-Non Finnish (NFE) AF: 0.0000133 AC: 12 AN: 902468

Other (OTH) AF: 0.00 AC: 0 AN: 44026

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

May 16, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.913C>T (p.R305W) alteration is located in exon 2 (coding exon 1) of the ZBTB12 gene. This alteration results from a C to T substitution at nucleotide position 913, causing the arginine (R) at amino acid position 305 to be replaced by a tryptophan (W). 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	Uncertain	0.43
BayesDel_addAF	Benign	-0.24	T
BayesDel_noAF	Benign	-0.58
CADD	Uncertain	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.16	T
Eigen	Benign	-0.53
Eigen_PC	Benign	-0.42
FATHMM_MKL	Benign	0.32	N
M_CAP	Uncertain	0.090	D
MetaRNN	Benign	0.17	T
MetaSVM	Benign	-0.95	T
MutationAssessor	Benign	0.34	N
PhyloP100		2.3
PrimateAI	Pathogenic	0.92	D
PROVEAN	Benign	-2.0	N
REVEL	Benign	0.056
Sift	Uncertain	0.0060	D
Sift4G	Uncertain	0.016	D
Polyphen		0.0020	B
Vest4		0.42
MutPred		0.52		Loss of disorder (P = 0.0052);
MVP		0.043
MPC		1.2
ClinPred		0.44	T
GERP RS		1.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.3
Varity_R		0.13
gMVP		0.36
Mutation Taster		=91/9	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: rs1767119165; hg19: chr6-31868170;