PMID- 10049781 OWN - NLM STAT- MEDLINE DCOM- 19990401 LR - 20061115 IS - 0006-291X (Print) IS - 0006-291X (Linking) VI - 255 IP - 3 DP - 1999 Feb 24 TI - Hepatocyte growth factor activator inhibitor type 2 lacking the first Kunitz-type serine proteinase inhibitor domain is a predominant product in mouse but not in human. PG - 740-8 AB - Hepatocyte growth factor activator inhibitor type 2 (HAI-2) is a new Kunitz-type serine protease inhibitor, which is purified and cloned from human stomach cancer cell line MKN45. The mature HAI-2 protein contains two Kunitz domains and the first domain is mainly responsible for the inhibitory activity against hepatocyte growth factor activator (HGFA). In this study, we identified the mouse homolog of HAI-2 (mHAI-2) by screening the data base of public expressed sequence tag (dbEST). In addition to a full-length cDNA corresponding to human HAI-2, a shorter size of mHAI-2 cDNA was obtained from mouse kidney by reverse-transcription polymerase chain reaction (RT-PCR). Sequence analysis of this shorter cDNA revealed that the region encoding the first Kunitz domain was completely deleted. Analysis of mouse genomic DNA showed that the deleted cDNA was generated by an alternative splicing mechanism. Surprisingly, the spliced form lacking the first Kunitz domain was a predominant transcript in all tissues of mice tested but not in those of human as assessed by RT-PCR analysis. This phenomenon is also confirmed by Western blot analysis using the specific antiserum against human HAI-2 protein. These results suggest that most of HAI-2 expressed in various tissues of mice may be unable to inhibit HGFA efficiently. CI - Copyright 1999 Academic Press. FAU - Itoh, H AU - Itoh H AD - Second Department of Pathology, Miyazaki Medical College, Kihara, Miyazaki, Kiyotake, 889-1692, Japan. FAU - Kataoka, H AU - Kataoka H FAU - Hamasuna, R AU - Hamasuna R FAU - Kitamura, N AU - Kitamura N FAU - Koono, M AU - Koono M LA - eng SI - GENBANK/AF099016 SI - GENBANK/AF099019 SI - GENBANK/AF099020 PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Biochem Biophys Res Commun JT - Biochemical and biophysical research communications JID - 0372516 RN - 0 (Membrane Glycoproteins) RN - 0 (RNA, Messenger) RN - 0 (SPINT2 protein, human) RN - 9088-41-9 (Trypsin Inhibitor, Kunitz Soybean) RN - EC 3.4.21.- (HGF activator) RN - EC 3.4.21.- (Serine Endopeptidases) SB - IM MH - Alternative Splicing/genetics MH - Amino Acid Sequence MH - Animals MH - Base Sequence MH - Cloning, Molecular MH - Exons/genetics MH - Expressed Sequence Tags MH - Humans MH - Introns/genetics MH - Membrane Glycoproteins/chemistry/*genetics MH - Mice MH - Molecular Sequence Data MH - Placenta/metabolism MH - RNA, Messenger/metabolism MH - Sequence Alignment MH - Sequence Analysis, DNA MH - Sequence Deletion/genetics MH - Serine Endopeptidases/metabolism MH - *Trypsin Inhibitor, Kunitz Soybean EDAT- 1999/03/02 00:00 MHDA- 1999/03/02 00:01 CRDT- 1999/03/02 00:00 PHST- 1999/03/02 00:00 [pubmed] PHST- 1999/03/02 00:01 [medline] PHST- 1999/03/02 00:00 [entrez] AID - S0006-291X(99)90268-1 [pii] AID - 10.1006/bbrc.1999.0268 [doi] PST - ppublish SO - Biochem Biophys Res Commun. 1999 Feb 24;255(3):740-8. doi: 10.1006/bbrc.1999.0268.