title: Comparative analysis of nuclear proteins of B cells in different developmental stages.
abstract: The developmental stage-specific regulation of V(D)J recombination, a gene rearrangement process of antigen receptor gene segments, is tightly controlled in cells. Here we screened proteins uniquely or differentially expressed among three developmentally distinguishable B cells (pro-B, pre-B and mature B cells) using two-dimensional gel electrophoresis and mass spectrometry. Chromatin assembly factor 1 was uniquely expressed in pro-B cells. Purine nucleotide phosphorylase, LCK, E2A and many other unidentified proteins were dominantly present in the nucleus at the early stage of B cell development where the V(D)J recombination process occurs. Also, few proteins including guanidine nucleotide binding proteins were exclusively expressed in pre-B cell. Such findings can provide some information to help understand the developmental regulation of gene rearrangement occurring during B cell development.
authors.affiliation: Department of Biochemistry, College of Medicine and Institute of Health Sciences, Gyeongsang National University, Jinju 660-751, South Korea.
authors.forename: Sun Hee
authors.initials: SH
authors.lastname: Jin
authors.forename: Eun Hye
authors.initials: EH
authors.lastname: Cho
authors.forename: Jung Eun
authors.initials: JE
authors.lastname: Ko
authors.forename: Eun Hee
authors.initials: EH
authors.lastname: Jung
authors.forename: Byungchan
authors.initials: B
authors.lastname: Ahn
authors.forename: Jong Ryeal
authors.initials: JR
authors.lastname: Hahm
authors.forename: Jae Won
authors.initials: JW
authors.lastname: Kim
authors.forename: Choong Won
authors.initials: CW
authors.lastname: Kim
authors.forename: Deok Ryong
authors.initials: DR
authors.lastname: Kim
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000166:cytology / Q000378:metabolism*; D002454:Cell Differentiation / Q000235:genetics / Q000502:physiology; D019070:Cell Lineage / Q000235:genetics*; D002467:Cell Nucleus / Q000378:metabolism*; D056504:Chromatin Assembly Factor-1; D002868:Chromosomal Proteins, Non-Histone / Q000378:metabolism*; D004268:DNA-Binding Proteins / Q000378:metabolism*; D015180:Electrophoresis, Gel, Two-Dimensional; D015322:Gene Rearrangement, B-Lymphocyte / Q000235:genetics; D051379:Mice; D011506:Proteins / Q000378:metabolism; D011995:Recombination, Genetic / Q000235:genetics; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
chemical_list: D056504:Chromatin Assembly Factor-1; D002868:Chromosomal Proteins, Non-Histone; D004268:DNA-Binding Proteins; D011506:Proteins