RPS-BLAST 2.2.22 [Sep-27-2009] Database: CddB 21,608 sequences; 5,994,473 total letters Searching..................................................done Query= 537021.9.peg.603_1 (37 letters) >gnl|CDD|130817 TIGR01756, LDH_protist, lactate dehydrogenase. This model represents a family of protist lactate dehydrogenases which have aparrently evolved from a recent protist malate dehydrogenase ancestor. Lactate dehydrogenase converts the hydroxyl at C-2 of lactate to a carbonyl in the product, pyruvate. The preference of this enzyme for NAD or NADP has not been determined. A critical residue in malate dehydrogenase, arginine-91 (T. vaginalis numbering) has been mutated to a leucine, eliminating the positive charge which complemeted the carboxylate in malate which is absent in lactate. Several other more subtle changes are proposed to make the active site smaller to accomadate the less bulky lactate molecule. Length = 313 Score = 24.8 bits (54), Expect = 5.1 Identities = 12/32 (37%), Positives = 18/32 (56%), Gaps = 6/32 (18%) Query: 6 SPVEAAIIKLRGWQYGEEFMLRTYSGESLSAG 37 SPV+A++ ++ W +G T GE LS G Sbjct: 224 SPVKASLQHMKAWLFG------TRPGEVLSMG 249 Database: CddB Posted date: Feb 4, 2011 9:54 PM Number of letters in database: 5,994,473 Number of sequences in database: 21,608 Lambda K H 0.321 0.138 0.414 Gapped Lambda K H 0.267 0.0700 0.140 Matrix: BLOSUM62 Gap Penalties: Existence: 11, Extension: 1 Number of Sequences: 21608 Number of Hits to DB: 605,039 Number of extensions: 18109 Number of successful extensions: 30 Number of sequences better than 10.0: 1 Number of HSP's gapped: 30 Number of HSP's successfully gapped: 3 Length of query: 37 Length of database: 5,994,473 Length adjustment: 11 Effective length of query: 26 Effective length of database: 5,756,785 Effective search space: 149676410 Effective search space used: 149676410 Neighboring words threshold: 11 Window for multiple hits: 40 X1: 16 ( 7.4 bits) X2: 38 (14.6 bits) X3: 64 (24.7 bits) S1: 41 (21.8 bits) S2: 50 (23.1 bits)