PMID- 11447604 OWN - NLM STAT- MEDLINE DCOM- 20010830 LR - 20061115 IS - 0749-503X (Print) IS - 0749-503X (Linking) VI - 18 IP - 10 DP - 2001 Jul TI - Cloning and characterization of a LON gene homologue from the human pathogen Paracoccidioides brasiliensis. PG - 981-8 AB - A LON gene homologue from the human pathogen Paracoccidioides brasiliensis (PbLON) has been cloned, sequenced and characterized. It encodes a putative ATP-dependent proteinase Lon, which in Saccharomyces cerevisisae (PIM1) is a heat-inducible protein involved in the degradation of abnormal or short-lived proteins in the mitochondria. The PbLON ORF is within a 3369 bp fragment interrupted by two introns located in the 3'segment. The 5' and 3' regions flanking the ORF contain sequences which resemble known transcription elements. Several transcription binding factor motifs have also been found, including sites for heat shock/stress response and nitrogen control. The deduced protein consists of 1063 residues containing a mitochondrial import signal at the N-terminus and conserved ATP-binding (GPPGVGKT) and serine catalytic (KDGPSAG) sites. It shares high identity with Lon homologues from S. cerevisiae (73%), Homo sapiens (62%) and Escherichia coli (56%). In P. brasiliensis, an MDJ1 putative gene has also been partially sequenced adjacent to PbLON, possibly sharing divergently orientated promoter elements. This chromosomal organization is interesting, since Mdj1p is a heat shock chaperone essential for substrate degradation by PIM1 in yeast. CI - Copyright 2001 John Wiley & Sons, Ltd. FAU - Barros, T F AU - Barros TF AD - Departamento de Microbiologia, Imunologia e Parasitologia da Universidade Federal de Sao Paulo, Sao Paulo, SP, Brazil. FAU - Puccia, R AU - Puccia R LA - eng SI - GENBANK/AF239178 PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Yeast JT - Yeast (Chichester, England) JID - 8607637 RN - 0 (Escherichia coli Proteins) RN - 0 (HSP40 Heat-Shock Proteins) RN - 0 (Heat-Shock Proteins) RN - 0 (MDJ1 protein, S cerevisiae) RN - 0 (Membrane Proteins) RN - 0 (Saccharomyces cerevisiae Proteins) RN - EC 3.4.21.- (ATP-Dependent Proteases) RN - EC 3.4.21.- (Serine Endopeptidases) RN - EC 3.4.21.53 (Lon protein, E coli) RN - EC 3.4.21.53 (Protease La) SB - IM MH - ATP-Dependent Proteases MH - Amino Acid Sequence MH - Base Sequence MH - Binding Sites MH - Chromosome Mapping MH - Chromosomes, Fungal MH - Cloning, Molecular MH - *Escherichia coli Proteins MH - Exons MH - *Genes, Fungal MH - HSP40 Heat-Shock Proteins MH - Heat-Shock Proteins/*genetics MH - Introns MH - Membrane Proteins/genetics MH - Molecular Sequence Data MH - Open Reading Frames MH - Paracoccidioides/*genetics/pathogenicity MH - *Protease La MH - Protein Transport MH - *Saccharomyces cerevisiae Proteins MH - Sequence Analysis, DNA MH - Sequence Homology, Amino Acid MH - Serine Endopeptidases/*genetics EDAT- 2001/07/12 10:00 MHDA- 2001/08/31 10:01 CRDT- 2001/07/12 10:00 PHST- 2001/07/12 10:00 [pubmed] PHST- 2001/08/31 10:01 [medline] PHST- 2001/07/12 10:00 [entrez] AID - 10.1002/yea.745 [doi] PST - ppublish SO - Yeast. 2001 Jul;18(10):981-8. doi: 10.1002/yea.745.