Variant Details

Variant: esv2759232

Internal ID

9981377

Landmark

Location Information

Type	Coordinates	Assembly	Other Links
Inner	chr4:22009958..22229095	hg38	UCSC Ensembl
Inner	chr4:22011581..22230718	hg19	UCSC Ensembl
Inner	chr4:21620679..21839816	hg18	UCSC Ensembl
Inner	chr4:21687850..21906987	hg17	UCSC Ensembl

Cytoband

4p15.2

Allele length

Assembly	Allele length
hg38	219138
hg19	219138
hg18	219138
hg17	219138

Variant Type

CNV loss

Copy Number

Allele State

Allele Origin

Probe Count

Validation Flag

Merged Status

Merged Variants

Supporting Variants

esv2757043, esv2757925

Samples

NA18633, NA07357, NA19192, NA12812, NA18558, NA10847, NA18871, NA10830, NA18912, NA18632, NA07348, NA18636, NA18500, NA12006

Known Genes

Method

BAC aCGH
SNP array

Analysis

Array images were acquired using an Agilent laser scanner (Agilent Technologies, UK). Fluorescence intensities and log2 ratio values were extracted using Bluefuse software (Bluegnome Ltd).
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)
Agilent

Comments

Reference

Redon_et_al_2006

Pubmed ID

17122850

Accession Number(s)

esv2759232

Frequency

Sample Size	270
Observed Gain	0
Observed Loss	14
Observed Complex	0
Frequency	n/a