1-52033008-G-C

Position:

• chr1-52033008-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_138417.3(KTI12):​c.754C>G​(p.Arg252Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000142 in 1,408,488 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: KTI12 NM_138417.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.38

Genes affected

KTI12 (HGNC:25160): (KTI12 chromatin associated homolog) Predicted to enable ATP binding activity. Predicted to be involved in regulation of transcription by RNA polymerase II and tRNA wobble uridine modification. [provided by Alliance of Genome Resources, Apr 2022]

TXNDC12 (HGNC:24626): (thioredoxin domain containing 12) This gene encodes a member of the thioredoxin superfamily. Members of this family are characterized by a conserved active motif called the thioredoxin fold that catalyzes disulfide bond formation and isomerization. This protein localizes to the endoplasmic reticulum and has a single atypical active motif. The encoded protein is mainly involved in catalyzing native disulfide bond formation and displays activity similar to protein-disulfide isomerases. This protein may play a role in defense against endoplasmic reticulum stress. Alternate splicing results in both coding and non-coding variants. [provided by RefSeq, Mar 2012]

ENSG00000285839 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.22022608).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KTI12	NM_138417.3	c.754C>G	p.Arg252Gly	missense_variant	1/1	ENST00000371614.2	NP_612426.1
TXNDC12	NM_015913.4	c.159-4378C>G		intron_variant		ENST00000371626.9	NP_056997.1
TXNDC12	NR_046405.1	n.2277C>G		non_coding_transcript_exon_variant	3/3
TXNDC12	NR_046406.1	n.2154C>G		non_coding_transcript_exon_variant	3/3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KTI12	ENST00000371614.2	c.754C>G	p.Arg252Gly	missense_variant	1/1	6	NM_138417.3	ENSP00000360676.1
TXNDC12	ENST00000371626.9	c.159-4378C>G		intron_variant		1	NM_015913.4	ENSP00000360688.4
ENSG00000285839	ENST00000648686.1	n.343C>G		non_coding_transcript_exon_variant	1/7			ENSP00000498140.1
TXNDC12	ENST00000472624.5	n.159-2460C>G		intron_variant		5		ENSP00000477120.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000142 AC: 2 AN: 1408488 Hom.: 0 Cov.: 33 AF XY: 0.00000144 AC XY: 1 AN XY: 696146

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000261

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 12, 2021

The c.754C>G (p.R252G) alteration is located in exon 1 (coding exon 1) of the KTI12 gene. This alteration results from a C to G substitution at nucleotide position 754, causing the arginine (R) at amino acid position 252 to be replaced by a glycine (G). 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	Benign	0.14
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.47
CADD	Uncertain	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.029	T
Eigen	Benign	0.12
Eigen_PC	Benign	0.16
FATHMM_MKL	Benign	0.37	N
LIST_S2	Benign	0.86	D
M_CAP	Benign	0.022	T
MetaRNN	Benign	0.22	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.9	M
PrimateAI	Benign	0.35	T
PROVEAN	Uncertain	-3.5	D
REVEL	Benign	0.060
Sift	Uncertain	0.029	D
Sift4G	Benign	0.076	T
Polyphen		0.58	P
Vest4		0.25
MutPred		0.52		Loss of methylation at R252 (P = 0.0497);
MVP		0.52
MPC		0.79
ClinPred		0.98	D
GERP RS		4.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.27
gMVP		0.46

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: chr1-52498680;