Variant Details

Variant: essv21620

Internal ID

9954854

Landmark

Location Information

Type	Coordinates	Assembly	Other Links
Inner	chr8:25114437..25126818	hg38	UCSC Ensembl
Outer	chr8:25114437..25136190	hg38	UCSC Ensembl
Inner	chr8:24971952..24984333	hg19	UCSC Ensembl
Outer	chr8:24971952..24993705	hg19	UCSC Ensembl
Inner	chr8:25027869..25040250	hg18	UCSC Ensembl
Outer	chr8:25027869..25049622	hg18	UCSC Ensembl
Inner	chr8:25027869..25040250	hg17	UCSC Ensembl
Outer	chr8:25027869..25049622	hg17	UCSC Ensembl

Cytoband

8p21.2

Allele length

Assembly	Allele length
hg38	21754
hg19	21754
hg18	21754
hg17	21754

Variant Type

CNV loss

Copy Number

Allele State

Allele Origin

Probe Count

Validation Flag

Merged Status

Merged Variants

esv2757268

Supporting Variants

Samples

NA07348

Known Genes

Method

SNP array

Analysis

The algorithm used to call CNVs using the 500K EA platform was developed to accurately define CNV regions using a large set of reference samples and is described in detail in a separate publication (Komura 2006). The algorithm contains three major parts: 1) Intensity pre-processing using an improved version of Genomic Imbalance Map (GIM) (Ishikawa et al. 2005), including probe selection, noise reduction, normalization, and intensity ratio adjustment based on affinity differences between alleles of a SNP, 2) CNV extraction, which identifies CNVs from all pair-wise comparisons using a modified SW-ARRAY, and 3) A copy number inference step which utilizes signal ratios and SNP information to more precisely define CNV boundaries and the copy number within each region.

Platform

Affymetrix GeneChip Early Access Mapping 500K Set Array (250K_Nsp_SNP)

Comments

Reference

Redon_et_al_2006

Pubmed ID

17122850

Accession Number(s)

essv21620

Frequency

Sample Size	270
Observed Gain	0
Observed Loss	1
Observed Complex	0
Frequency	n/a