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Microsequences of 145 proteins recorded in the two‐dimensional gel protein database of normal human epidermal keratinocytes
Author(s) -
Rasmussen Hanne H.,
Van Damme Josef,
Puype Magda,
Gesser Borbala,
Celis Julio E.,
Vandekerckhove Joël
Publication year - 1992
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.11501301199
Subject(s) - coomassie brilliant blue , trypsin , keratinocyte , gel electrophoresis , database , polyacrylamide gel electrophoresis , two dimensional gel electrophoresis , biology , electrophoresis , peptide sequence , microbiology and biotechnology , biochemistry , chemistry , proteomics , genetics , gene , in vitro , enzyme , staining , computer science
Microsequencing of proteins recovered from two‐dimensional (2‐D) gels is being used systematically to identify proteins in the master human keratinocyte 2‐D gel database. To date, about 250 protein spots recorded in human 2‐D gel databases have been microsequenced and, of these, 145 are recorded in the keratinocyte database under the entry partial amino acid sequence . Coomassie Brilliant Blue‐stained protein spots cut from several (up to 40) dry gels were concentrated by elution‐concentration gel electrophoresis, electroblotted onto PVDF membranes and digested in situ with trypsin. Eluting peptides were separated by reversed‐phase HPLC, collected individually and sequenced. Computer search using the FASTA and TFASTA programs from Genetics Computer Group indicated that 110 of the microsequenced polypeptides shared significant similarity with proteins contained in the PIR, Mipsx or GenEMBL databases. Only 35 polypeptides corresponded to hitherto unknown proteins. Peptide sequences of all 145 proteins are listed together with their coordinates (apparent molecular weight and p I ) in the keratinocyte database.