chr10-87863421-CCCCTGCCCTG-C

Variant names:

• chr10-87863421-CCCCTGCCCTG-C
• rs587781357
• NM_001126049.2:c.-944_-935delCAGGGCAGGG

Variant summary

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

The NM_001126049.2(KLLN):​c.-944_-935delCAGGGCAGGG variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: KLLN NM_001126049.2 5_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.21
• Publications: 1 publications found

Genes affected

KLLN (HGNC:37212): (killin, p53 regulated DNA replication inhibitor) The protein encoded by this intronless gene is found in the nucleus, where it can inhibit DNA synthesis and promote S phase arrest coupled to apoptosis. The expression of this DNA binding protein is upregulated by transcription factor p53. [provided by RefSeq, Dec 2012]

PTEN (HGNC:9588): (phosphatase and tensin homolog) This gene was identified as a tumor suppressor that is mutated in a large number of cancers at high frequency. The protein encoded by this gene is a phosphatidylinositol-3,4,5-trisphosphate 3-phosphatase. It contains a tensin like domain as well as a catalytic domain similar to that of the dual specificity protein tyrosine phosphatases. Unlike most of the protein tyrosine phosphatases, this protein preferentially dephosphorylates phosphoinositide substrates. It negatively regulates intracellular levels of phosphatidylinositol-3,4,5-trisphosphate in cells and functions as a tumor suppressor by negatively regulating AKT/PKB signaling pathway. The use of a non-canonical (CUG) upstream initiation site produces a longer isoform that initiates translation with a leucine, and is thought to be preferentially associated with the mitochondrial inner membrane. This longer isoform may help regulate energy metabolism in the mitochondria. A pseudogene of this gene is found on chromosome 9. Alternative splicing and the use of multiple translation start codons results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Feb 2015]

PTEN Gene-Disease associations (from GenCC):

• Cowden syndrome 1

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), G2P
• PTEN hamartoma tumor syndrome

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• macrocephaly-autism syndrome

  Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Genomics England PanelApp, Orphanet
• renal cell carcinoma

  Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
• leiomyosarcoma

  Inheritance: AR Classification: MODERATE Submitted by: Genomics England PanelApp
• activated PI3K-delta syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Bannayan-Riley-Ruvalcaba syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Cowden disease

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Lhermitte-Duclos disease

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Proteus-like syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• glioma susceptibility 2

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

MLDHR (HGNC:55481):

ACMG classification

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

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KLLN	NM_001126049.2	c.-944_-935delCAGGGCAGGG		5_prime_UTR_variant	Exon 1 of 1	ENST00000445946.5	NP_001119521.1
PTEN	NM_000314.8	c.-1048_-1039delCCCTGCCCTG		upstream_gene_variant		ENST00000371953.8	NP_000305.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KLLN	ENST00000445946.5	c.-944_-935delCAGGGCAGGG		5_prime_UTR_variant	Exon 1 of 1	6	NM_001126049.2	ENSP00000392204.2
PTEN	ENST00000371953.8	c.-1048_-1039delCCCTGCCCTG		upstream_gene_variant		1	NM_000314.8	ENSP00000361021.3
MLDHR	ENST00000692337.1	c.-137_-128delCCCTGCCCTG		upstream_gene_variant				ENSP00000509326.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 218352 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 110980

African (AFR) AF: 0.00 AC: 0 AN: 6144

American (AMR) AF: 0.00 AC: 0 AN: 6268

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 8010

East Asian (EAS) AF: 0.00 AC: 0 AN: 20720

South Asian (SAS) AF: 0.00 AC: 0 AN: 1966

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 22318

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 1150

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 137704

Other (OTH) AF: 0.00 AC: 0 AN: 14072

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:1

Oct 16, 2018

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.-1039_-1030del10 gross deletion is located in the 5' untranslated region (5'UTR) of the PTEN gene; however, the exact breakpoints of the deletion were not determined. This variant is located in the promoter region of the PTEN gene, but its potential impact on PTEN regulation has not yet been investigated (Zhou XP et al. Am. J. Hum. Genet. 2003 Aug;73:404-11). This nucleotide position is conserved on limited sequence alignment. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		1.2

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs587781357; hg19: chr10-89623178;