rs1555535747

Variant names:

• chr16-67626665-A-G
• rs1555535747
• NM_006565.4:c.1468A>G

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The NM_006565.4(CTCF):​c.1468A>G​(p.Lys490Glu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: CTCF NM_006565.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.29
• Publications: 0 publications found

Genes affected

CTCF (HGNC:13723): (CCCTC-binding factor) This gene is a member of the BORIS + CTCF gene family and encodes a transcriptional regulator protein with 11 highly conserved zinc finger (ZF) domains. This nuclear protein is able to use different combinations of the ZF domains to bind different DNA target sequences and proteins. Depending upon the context of the site, the protein can bind a histone acetyltransferase (HAT)-containing complex and function as a transcriptional activator or bind a histone deacetylase (HDAC)-containing complex and function as a transcriptional repressor. If the protein is bound to a transcriptional insulator element, it can block communication between enhancers and upstream promoters, thereby regulating imprinted expression. Mutations in this gene have been associated with invasive breast cancers, prostate cancers, and Wilms' tumors. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2010]

CTCF Gene-Disease associations (from GenCC):

• intellectual disability-feeding difficulties-developmental delay-microcephaly syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics, Orphanet
• syndromic intellectual disability

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the CTCF gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 29 curated pathogenic missense variants (we use a threshold of 10). The gene has 7 curated benign missense variants. Gene score misZ: 4.4399 (above the threshold of 3.09). Trascript score misZ: 4.8366 (above the threshold of 3.09). GenCC associations: The gene is linked to intellectual disability-feeding difficulties-developmental delay-microcephaly syndrome, syndromic intellectual disability.
• BP4: Computational evidence support a benign effect (MetaRNN=0.32743388).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CTCF	NM_006565.4	c.1468A>G	p.Lys490Glu	missense_variant	Exon 8 of 12	ENST00000264010.10	NP_006556.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CTCF	ENST00000264010.10	c.1468A>G	p.Lys490Glu	missense_variant	Exon 8 of 12	1	NM_006565.4	ENSP00000264010.4

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1411556 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 699376

African (AFR) AF: 0.00 AC: 0 AN: 31386

American (AMR) AF: 0.00 AC: 0 AN: 35654

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 24452

East Asian (EAS) AF: 0.00 AC: 0 AN: 38304

South Asian (SAS) AF: 0.00 AC: 0 AN: 79994

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52674

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5532

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1085772

Other (OTH) AF: 0.00 AC: 0 AN: 57788

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

May 12, 2017

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Lines of evidence used in support of classification: UNCERTAIN: Alteration(s) of Uncertain Clinical Significance Detected -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Benign	-0.010	T
BayesDel_noAF	Benign	-0.25
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Benign	0.31	T;T;.;.;T;T;.;T
Eigen	Uncertain	0.36
Eigen_PC	Uncertain	0.46
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.94	.;.;D;.;.;.;D;D
M_CAP	Benign	0.013	T
MetaRNN	Benign	0.33	T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.96	L;L;.;.;L;L;.;L
PhyloP100		7.3
PrimateAI	Pathogenic	0.91	D
PROVEAN	Benign	-1.3	N;.;N;.;.;.;.;.
REVEL	Benign	0.21
Sift	Benign	0.46	T;.;T;.;.;.;.;.
Sift4G	Benign	0.56	T;.;T;.;.;.;.;.
Polyphen		0.94	P;P;.;.;P;P;.;P
Vest4		0.56
MutPred		0.42		Loss of methylation at K490 (P = 0.0061);Loss of methylation at K490 (P = 0.0061);.;Loss of methylation at K490 (P = 0.0061);Loss of methylation at K490 (P = 0.0061);Loss of methylation at K490 (P = 0.0061);Loss of methylation at K490 (P = 0.0061);Loss of methylation at K490 (P = 0.0061);
MVP		0.69
MPC		3.5
ClinPred		0.86	D
GERP RS		5.2
Varity_R		0.59
gMVP		0.89
Mutation Taster		=38/62	disease causing

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: rs1555535747; hg19: chr16-67660568;