Journal: Inflammation Research
Article Title: Monoclonal antibodies for human and porcine histamine N-methyltransferase (HMT) facilitate protein expression and localization studies
Figure Lengend Snippet: Recombinant HMT antigens used for immunizations. a Recombinant human and porcine GST-HMT fusion proteins cloned in the bacterial expression vector pGEX-2T. b 12.5 % Silver-stained polyacrylamide gel of the purified human ( lane 1 ) and porcine ( lane 3 ) GST-HMT fusion proteins used for the immunization of mice and the HMT and GST products resulting from cleavage with thrombin protease ( lanes 2 and 4 ). The sizes of molecular weight markers ( M ) are given on the left in kilodalton. c Sequence alignment and percent sequence identity of the HMT proteins from man, pig, mouse and rat obtained with the NCBI Constrained-based Multiple Alignment Tool ( www.ncbi.nlm.nih.gov/tools/cobalt/cobalt.cgi?link_loc=BlastHomeLink ). Residues identical in all four proteins are shaded black , residues identical in three proteins are shaded gray , and residues that have been shown to interact with histamine and S-adenosylhomocysteine in human HMT [ 7 ] are shaded red (indicated by plus symbol on top) and blue (indicated by hash on top), respectively. Antigenicity plots of human ( d ) and porcine ( e ) HMT produced with the BepiPred Linear Epitope Prediction Tool ( www.tools.immuneepitope.org/bcell ) [ 32 ] show similar predicted B-cell epitopes ( yellow peaks on top of the threshold line with reference to amino acid positions) for both protein sequences
Article Snippet: Preparation of recombinant HMT proteins Full-length human and porcine HMT cDNAs [ , , ] were amplified by PCR with specific primers from total human and porcine kidney cDNA, respectively, and cloned in frame into the bacterial expression vector pGEX-2T (GE Healthcare, Vienna, Austria).
Techniques: Recombinant, HMT Assay, Clone Assay, Expressing, Plasmid Preparation, Staining, Purification, Mouse Assay, Molecular Weight, Sequencing, Produced