chr19-7631250-G-T

Variant names:

• chr19-7631250-G-T
• NM_001171155.2:c.139-223G>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001171155.2(PET100):​c.139-223G>T variant causes a intron 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: 31)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: PET100 NM_001171155.2 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.109
• Publications: 0 publications found

Genes affected

PET100 (HGNC:40038): (PET100 cytochrome c oxidase chaperone) Mitochondrial complex IV, or cytochrome c oxidase, is a large transmembrane protein complex that is part of the respiratory electron transport chain of mitochondria. The small protein encoded by this gene plays a role in the biogenesis of mitochondrial complex IV. This protein localizes to the inner mitochondrial membrane and is exposed to the intermembrane space. Mutations in this gene are associated with mitochondrial complex IV deficiency. This gene has a pseudogene on chromosome 3. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Apr 2014]

ENSG00000268400 (HGNC:):

STXBP2 (HGNC:11445): (syntaxin binding protein 2) This gene encodes a member of the STXBP/unc-18/SEC1 family. The encoded protein is involved in intracellular trafficking, control of SNARE (soluble NSF attachment protein receptor) complex assembly, and the release of cytotoxic granules by natural killer cells. Mutations in this gene are associated with familial hemophagocytic lymphohistiocytosis. Alternatively spliced transcript variants encoding different isoforms have been noted for this gene. [provided by RefSeq, Jan 2013]

STXBP2 Gene-Disease associations (from GenCC):

• familial hemophagocytic lymphohistiocytosis 5

  Inheritance: AD, AR Classification: DEFINITIVE, STRONG, LIMITED Submitted by: Ambry Genetics, PanelApp Australia, Labcorp Genetics (formerly Invitae), ClinGen
• hereditary hemophagocytic lymphohistiocytosis

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• microvillus inclusion disease

  Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001171155.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PET100	NM_001171155.2	MANE Select	c.139-223G>T		intron	N/A	NP_001164626.1	P0DJ07
	STXBP2	NM_001414484.1		c.-60+404G>T		intron	N/A	NP_001401413.1
	PET100	NR_033242.2		n.198G>T		non_coding_transcript_exon	Exon 4 of 5

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PET100	ENST00000594797.6	TSL:1 MANE Select	c.139-223G>T		intron	N/A	ENSP00000470539.1	P0DJ07
	ENSG00000268400	ENST00000698368.1		n.114+591G>T		intron	N/A	ENSP00000513686.1	A0A8V8TM65
	PET100	ENST00000698397.1		c.*13G>T		3_prime_UTR	Exon 4 of 4	ENSP00000513692.1	A0A8V8TN53

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1262900 Hom.: 0 Cov.: 28 AF XY: 0.00 AC XY: 0 AN XY: 611030

African (AFR) AF: 0.00 AC: 0 AN: 27806

American (AMR) AF: 0.00 AC: 0 AN: 17592

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 18524

East Asian (EAS) AF: 0.00 AC: 0 AN: 33616

South Asian (SAS) AF: 0.00 AC: 0 AN: 58038

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 28962

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3522

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1022406

Other (OTH) AF: 0.00 AC: 0 AN: 52434

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	1.8
DANN	Benign	0.84
PhyloP100		0.11

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr19-7696136;