RPS-BLAST 2.2.22 [Sep-27-2009] Database: CddA 21,609 sequences; 6,263,737 total letters Searching..................................................done Query= 537021.9.peg.493_1 (64 letters) >gnl|CDD|133266 cd01863, Rab18, Rab18 subfamily. Mammalian Rab18 is implicated in endocytic transport and is expressed most highly in polarized epithelial cells. However, trypanosomal Rab, TbRAB18, is upregulated in the BSF (Blood Stream Form) stage and localized predominantly to elements of the Golgi complex. In human and mouse cells, Rab18 has been identified in lipid droplets, organelles that store neutral lipids. GTPase activating proteins (GAPs) interact with GTP-bound Rab and accelerate the hydrolysis of GTP to GDP. Guanine nucleotide exchange factors (GEFs) interact with GDP-bound Rabs to promote the formation of the GTP-bound state. Rabs are further regulated by guanine nucleotide dissociation inhibitors (GDIs), which facilitate Rab recycling by masking C-terminal lipid binding and promoting cytosolic localization. Most Rab GTPases contain a lipid modification site at the C-terminus, with sequence motifs CC, CXC, or CCX. Lipid binding is essential for membrane attachment, a key feature of most Rab proteins. Due to the presence of truncated sequences in this CD, the lipid modification site is not available for annotation. Length = 161 Score = 24.5 bits (54), Expect = 5.6 Identities = 6/18 (33%), Positives = 10/18 (55%) Query: 41 IWIEEIKYYCKEANIVSM 58 W+ E++ Y +IV M Sbjct: 93 TWLNELETYSTNNDIVKM 110 Database: CddA Posted date: Feb 4, 2011 9:38 PM Number of letters in database: 6,263,737 Number of sequences in database: 21,609 Lambda K H 0.332 0.142 0.478 Gapped Lambda K H 0.267 0.0595 0.140 Matrix: BLOSUM62 Gap Penalties: Existence: 11, Extension: 1 Number of Sequences: 21609 Number of Hits to DB: 873,650 Number of extensions: 36103 Number of successful extensions: 174 Number of sequences better than 10.0: 1 Number of HSP's gapped: 174 Number of HSP's successfully gapped: 6 Length of query: 64 Length of database: 6,263,737 Length adjustment: 36 Effective length of query: 28 Effective length of database: 5,485,813 Effective search space: 153602764 Effective search space used: 153602764 Neighboring words threshold: 11 Window for multiple hits: 40 X1: 15 ( 7.2 bits) X2: 38 (14.6 bits) X3: 64 (24.7 bits) S1: 40 (22.0 bits) S2: 51 (23.7 bits)