A curated catalogue of human genomic structural variation




Variant Details

Variant: esv32744



Internal ID12618002
Landmark
Location Information
TypeCoordinatesAssemblyOther Links
InnerchrX:2831875..2848215hg38UCSC Ensembl
InnerchrX:2749916..2766256hg19UCSC Ensembl
InnerchrX:2759916..2776256hg18UCSC Ensembl
InnerchrX:2743277..2759617hg17UCSC Ensembl
CytobandXp22.33
Allele length
AssemblyAllele length
hg3816341
hg1916341
hg1816341
hg1716341
Variant TypeCNV loss
Copy Number
Allele State
Allele Origin
Probe Count
Validation Flag
Merged StatusM
Merged Variants
Supporting Variantsessv93305
Samples22170
Known GenesGYG2
MethodOligo aCGH
AnalysisData from the focused confirmation array were analysed using the ADM-2 algorithm at threshold 4. The ADM-2 algorithm uses log2 ratios weighted by log2 ratio error as calculated by Feature Extraction software to identify genomic intervals with copy number differences between the sample and the reference. Data were centralized, and calls with average log2 ratios less than 0.3 were excluded from the analysis, as were any calls detected by probes containing a known SNP that may alter an AluI or RsaI restriction site as determined by the 9.3 million in the UCSC annotation database for the genome browser (Karolchik D. et al. The UCSC Genome Browser Database. Nucleic Acids Res. (2003) 31:51-54.). The false-positive rate for the ADM-2 algorithm at threshold 4 was determined using three self-self hybridizations of the reference sample. In the three replicate self-self experiments, ADM-2 analysis with threshold 4 identified an average of 29.6 single-probe intervals and 10.3 multi-probe intervals. Comparing the average number of variant interval calls in self-self experiments with the average number of variant interval calls for each sample, we estimated the false-positive rate to be 0.05 (10.3/197) for multi-probe calls and 0.04 (29.6/669) for single-probe calls. The false-negative rate was estimated in a manner similar to that described by Wong et al. (Wong et al. A comprehensive analysis of common copy-number variations in the human genome. Am. J. Hum. Genet. (2007) 80:91-104.) based on four replicate experiments for one of the samples. In four replicate experiments, 223 putative variant intervals were observed two or more times and were considered true calls (49 intervals were observed twice, 43 intervals were observed three times and 131 intervals were observed four times), yielding an estimate of false-negative rate of 0.16 [(2*49+43)/(4*223)=0.16]. In this analysis, we conservatively considered aberrant intervals in two experiments the same if they overlapped by more than 0.9.
PlatformAgilent-015366 Custom Human 244K CGH Microarray
Comments
Referencede_Smith_et_al_2007
Pubmed ID17666407
Accession Number(s)esv32744
Frequency
Sample Size51
Observed Gain0
Observed Loss1
Observed Complex0
Frequencyn/a


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