chr9-107487627-T-C

Position:

• chr9-107487627-T-C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_004235.6(KLF4):​c.767A>G​(p.Asp256Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000276 in 1,450,980 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/19 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: 0.0000028 (0 hom.)
• Consequence: KLF4 NM_004235.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.257

Genes affected

KLF4 (HGNC:6348): (KLF transcription factor 4) This gene encodes a protein that belongs to the Kruppel family of transcription factors. The encoded zinc finger protein is required for normal development of the barrier function of skin. The encoded protein is thought to control the G1-to-S transition of the cell cycle following DNA damage by mediating the tumor suppressor gene p53. Mice lacking this gene have a normal appearance but lose weight rapidly, and die shortly after birth due to fluid evaporation resulting from compromised epidermal barrier function. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Sep 2015]

KLF4 (HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.06735471).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KLF4	NM_004235.6	c.767A>G	p.Asp256Gly	missense_variant	3/5	ENST00000374672.5	NP_004226.3
KLF4	NM_001314052.2	c.767A>G	p.Asp256Gly	missense_variant	3/4		NP_001300981.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KLF4	ENST00000374672.5	c.767A>G	p.Asp256Gly	missense_variant	3/5	1	NM_004235.6	ENSP00000363804.4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000276 AC: 4 AN: 1450980 Hom.: 0 Cov.: 32 AF XY: 0.00000416 AC XY: 3 AN XY: 722008

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000360

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

Jan 25, 2023

The c.767A>G (p.D256G) alteration is located in exon 3 (coding exon 3) of the KLF4 gene. This alteration results from a A to G substitution at nucleotide position 767, causing the aspartic acid (D) at amino acid position 256 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
BayesDel_addAF	Benign	-0.29	T
BayesDel_noAF	Benign	-0.66
CADD	Benign	20
DANN	Uncertain	0.98
Eigen	Benign	-0.60
Eigen_PC	Benign	-0.48
FATHMM_MKL	Benign	0.44	N
LIST_S2	Benign	0.67	T
M_CAP	Benign	0.022	T
MetaRNN	Benign	0.067	T
MetaSVM	Benign	-0.95	T
MutationAssessor	Benign	1.4	L
PrimateAI	Uncertain	0.69	T
PROVEAN	Benign	-1.0	N
REVEL	Benign	0.088
Sift	Benign	0.19	T
Sift4G	Benign	0.44	T
Polyphen		0.0	B
Vest4		0.18
MutPred		0.14		Gain of catalytic residue at S258 (P = 0.0577);
MVP		0.20
MPC		0.88
ClinPred		0.44	T
GERP RS		4.9
gMVP		0.40

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: chr9-110249908;