ENCBS283TEI / cell line

Status: released
Term name: K562
Term ID: EFO:0002067
Summary: Homo sapiens K562 cell line genetically modified (insertion) using CRISPR targeting H. sapiens PBX2

Accession	Category	Purpose	Method	Nucleic acid delivery method	Site
ENCGM249WDX	insertion	tagging	CRISPR		Target PBX2-human

Caption excerpt: K562 whole cell lysate was immunoprecipitated using the primary antibody…

Caption: K562 whole cell lysate was immunoprecipitated using the primary antibody (Sigma; F1804). The IP fraction was loaded on a 12% Bio-Rad TGX gel and separated with the Bio-Rad Tetra Cell system. The whole lane was excised and sent to the University of Alabama at Birmingham Cancer Center Mass Spectrometry/Proteomics Shared Facility. Analysis of whole lane gel from K562: The sample was analyzed on a LTQ XL Linear Ion Trap Mass Spectrometer by LC-ESI-MS/MS. Peptides were identified using SEQUEST tandem mass spectral analysis with probability based matching at p < 0.05. SEQUEST results were reported with ProteinProphet protXML Viewer (TPP v4.4 JETSTREAM) and filtered for a minimum probability of 0.9. All protein hits that met these criteria were reported, including common contaminants. Fold enrichment for each protein reported was determined using a custom script based on the FC-B score calculation from the reference Mellacheruvu et al., 2013. The CRAPome: a contaminant repository for affinity purification mass spectrometry data. Nat. Methods. 10(8):730-736. Doi:10.1038/nmeth.2557. The target protein, ATF1, was identified as the 6th enriched protein and the 1st transcription factor based on IP-Mass Spectrometry.
Submitted by: Keenan Graham
Lab: Richard Myers, HAIB
Grant: U54HG006998
Documents: richard-myers:FLAG-sorted
FLAG-TAG_Raw_sorted.txt