NM_000314.8:c.-835C>G

Variant names:

• chr10-87863635-C-G
• rs587779994
• NM_000314.8:c.-835C>G

Variant summary

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

The NM_000314.8(PTEN):​c.-835C>G variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PTEN NM_000314.8 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.69
• Publications: 3 publications found

Genes affected

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]

MLDHR (HGNC:55481):

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]

KLLN Gene-Disease associations (from GenCC):

• Cowden disease

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Cowden syndrome 4

  Inheritance: Unknown Classification: NO_KNOWN Submitted by: Ambry Genetics

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 (BayesDel_noAF=-0.29).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000314.8. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PTEN	NM_000314.8	MANE Select	c.-835C>G		5_prime_UTR_premature_start_codon_gain	Exon 1 of 9	NP_000305.3
	PTEN	NM_000314.8	MANE Select	c.-835C>G		5_prime_UTR	Exon 1 of 9	NP_000305.3
	PTEN	NM_001304717.5		c.-315C>G		5_prime_UTR_premature_start_codon_gain	Exon 1 of 10	NP_001291646.4

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PTEN	ENST00000371953.8	TSL:1 MANE Select	c.-835C>G		5_prime_UTR_premature_start_codon_gain	Exon 1 of 9	ENSP00000361021.3
	MLDHR	ENST00000692337.1		c.77C>G	p.Ser26Cys	missense	Exon 1 of 1	ENSP00000509326.1
	PTEN	ENST00000371953.8	TSL:1 MANE Select	c.-835C>G		5_prime_UTR	Exon 1 of 9	ENSP00000361021.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 0

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000113

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.29
CADD	Benign	23
DANN	Benign	0.90
PhyloP100		1.7
PromoterAI		-0.086	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Mutation Taster		=275/25	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: rs587779994; hg19: chr10-89623392;