| Accession | TIGR01782 |
| Name | TonB-Xanth-Caul |
| Function | TonB-dependent receptor |
| Trusted Cutoff | 310.00 |
| Domain Trusted Cutoff | 310.00 |
| Noise Cutoff | 123.00 |
| Domain Noise Cutoff | 123.00 |
| Isology Type | subfamily |
| HMM Length | 868 |
| Mainrole Category | Transport and binding proteins |
| Subrole Category | Porins |
| Gene Ontology Term | GO:0006810: transport biological_process |
| | GO:0019867: outer membrane cellular_component |
| | GO:0022857: transmembrane transporter activity molecular_function |
| Author | Selengut J |
| Entry Date | Jan 2 2003 10:24AM |
| Last Modified | Feb 14 2011 3:27PM |
| Comment | This model represents a family of TonB-dependent outer-membrane receptors which are found mainly in Xanthomonas and Caulobacter. These appear to represent the expansion of a paralogous family in that the 22 X. axonopodis (21 in X. campestris) and 18 C. crescentus sequences are more closely related to each other than any of the many TonB-dependent receptors found in other species. In fact, the Crescentus and Xanthomonas sequences are inseparable on a phylogenetic tree using a PAM-weighted neighbor-joining method, indicating that one of the two genuses may have acquired this set of receptors from the other. The mechanism by which this family is shared between Xanthomonas, a gamma proteobacterial plant pathogen and Caulobacter, an alpha proteobacterial aquatic organism is unclear. |
