Protein Info for SO1181 in Shewanella oneidensis MR-1

Name: miaB
Annotation: tRNA-i(6)A37 modification enzyme MiaB (NCBI ptt file)

These analyses and tools can help you predict a protein's function, but be skeptical. For enzymes, over 10% of annotations from KEGG or SEED are probably incorrect. For other types of proteins, the error rates may be much higher. MetaCyc and Swiss-Prot have low error rates, but the best hits in these databases are often quite distant, so this protein's function may not be the same. TIGRFam has low error rates. Finally, many experimentally-characterized proteins are not in any of these databases. To find relevant papers, use PaperBLAST.

Protein Families and Features

1 50 100 150 200 250 300 350 400 474 PF00919: UPF0004" amino acids 4 to 104 (101 residues), 104.3 bits, see alignment E=4.2e-34 TIGR01574: tRNA-i(6)A37 thiotransferase enzyme MiaB" amino acids 4 to 439 (436 residues), 657.5 bits, see alignment E=1.1e-201 TIGR00089: radical SAM methylthiotransferase, MiaB/RimO family" amino acids 4 to 437 (434 residues), 506.9 bits, see alignment E=4.5e-156 PF04055: Radical_SAM" amino acids 151 to 325 (175 residues), 87 bits, see alignment E=2.5e-28 PF01938: TRAM" amino acids 380 to 439 (60 residues), 62.5 bits, see alignment E=4.1e-21

Best Hits

Swiss-Prot: 100% identical to MIAB_SHEON: tRNA-2-methylthio-N(6)-dimethylallyladenosine synthase (miaB) from Shewanella oneidensis (strain MR-1)

KEGG orthology group: K06168, bifunctional enzyme involved in thiolation and methylation of tRNA (inferred from 100% identity to son:SO_1181)

MetaCyc: 77% identical to isopentenyl-adenosine A37 tRNA methylthiolase (Escherichia coli K-12 substr. MG1655)
RXN0-5063 [EC: 2.8.4.3]

Predicted SEED Role

"tRNA-i(6)A37 methylthiotransferase" in subsystem Ribosomal protein S12p Asp methylthiotransferase or tRNA processing

Isozymes

No predicted isozymes

Use Curated BLAST to search for 2.8.4.3

Sequence Analysis Tools

PaperBLAST (search for papers about homologs of this protein)

Search CDD (the Conserved Domains Database, which includes COG and superfam)

Compare to protein structures

Predict protein localization: PSORTb (Gram-negative bacteria)

Predict transmembrane helices and signal peptides: Phobius

Check the current SEED with FIGfam search

Find homologs in fast.genomics or the ENIGMA genome browser

See Q8CX45 at UniProt or InterPro

Protein Sequence (474 amino acids)

>SO1181 tRNA-i(6)A37 modification enzyme MiaB (NCBI ptt file) (Shewanella oneidensis MR-1)
MSKKLHIKTWGCQMNEYDSSKMADLLGEYQGYTLTEEAEEADILLLNTCSIREKAQEKVF
HQLGRWKTLKDKNPDLIIGVGGCVASQEGKAIKDRAQCVDIIFGPQTLHRLPEMIEQVRR
GEKAVIDVSFPEIEKFDRLPEPRAEGPTAFVSIMEGCSKYCSFCVVPYTRGEEVSRPSDD
IILEIAQLAEQGVREVNLLGQNVNAYRGATHDGGICTFAELLRYVAAIDGIDRIRFTTSH
PIEFTQDIIDVYEDTPELVSFLHLPVQSGSDRILTAMKRGHMAIEYKSIIRRLRKARPDI
QISSDFIIGFPGETQEDFADTMKLIEDVAFDHSFSFIYSARPGTPAADLPDDVDMEEKKQ
RLAILQDRITQQAMRYSRHMMGTVQRILVEGPSVKNPMELRGRTENNRVVNFEGLPKHIG
TFVDVEIVDVYTNSLRGKFIRGEDEMDLRRNLRPSDILAKHKQDDDLGVTQFKP