TolR
From Proteopedia
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::Domain I is important for the interactions between TolA and TolQ, as deletion of this domain resulted in no cross-linkages formed between these proteins.<ref name='Journet'>PMID: 10419942</ref> | ::Domain I is important for the interactions between TolA and TolQ, as deletion of this domain resulted in no cross-linkages formed between these proteins.<ref name='Journet'>PMID: 10419942</ref> | ||
::Domain III of TolR has also been shown to be involved in the TolQ-TolR interaction, but not directly linked.<ref name='Lazzaroni'>PMID: 7853390</ref> However, even when deleted there is still cross linking between TolR and TolQ showing that domain III does not affect the interaction between the two proteins, but could instead affect the function of TolR.<ref name='Journet'>PMID: 10419942</ref> As domain III has not been shown to interact with TolA or TolQ directly, the function of TolR could be affected by domain III affecting the conformation of domain I thereby affecting the interaction between TolA/TolQ-TolR. | ::Domain III of TolR has also been shown to be involved in the TolQ-TolR interaction, but not directly linked.<ref name='Lazzaroni'>PMID: 7853390</ref> However, even when deleted there is still cross linking between TolR and TolQ showing that domain III does not affect the interaction between the two proteins, but could instead affect the function of TolR.<ref name='Journet'>PMID: 10419942</ref> As domain III has not been shown to interact with TolA or TolQ directly, the function of TolR could be affected by domain III affecting the conformation of domain I thereby affecting the interaction between TolA/TolQ-TolR. | ||
| - | ::Therefore, domains I and III are important for the function of TolR. | ||
| - | |||
# Colicin import | # Colicin import | ||
# Maintaining cell envelope integrity | # Maintaining cell envelope integrity | ||
Revision as of 15:07, 22 April 2011
TolR is a bitopic protein located in the inner membrane.
Structure
TolR consists of three domains: domain I (from residues 1 to 43 and including the transmembrane domain between residues 23 to 43), domain II and domain III from residues 117 to 142.[1] Domains II and III have the ability to dimerize.[2]
Function
TolR has been shown to exhibit several functions.
- Interactions with other Tol proteins
- Domain I is important for the interactions between TolA and TolQ, as deletion of this domain resulted in no cross-linkages formed between these proteins.[1]
- Domain III of TolR has also been shown to be involved in the TolQ-TolR interaction, but not directly linked.[3] However, even when deleted there is still cross linking between TolR and TolQ showing that domain III does not affect the interaction between the two proteins, but could instead affect the function of TolR.[1] As domain III has not been shown to interact with TolA or TolQ directly, the function of TolR could be affected by domain III affecting the conformation of domain I thereby affecting the interaction between TolA/TolQ-TolR.
- Colicin import
- Maintaining cell envelope integrity
References
- ↑ 1.0 1.1 1.2 Journet L, Rigal A, Lazdunski C, Benedetti H. Role of TolR N-terminal, central, and C-terminal domains in dimerization and interaction with TolA and tolQ. J Bacteriol. 1999 Aug;181(15):4476-84. PMID:10419942
- ↑ Walburger A, Lazdunski C, Corda Y. The Tol/Pal system function requires an interaction between the C-terminal domain of TolA and the N-terminal domain of TolB. Mol Microbiol. 2002 May;44(3):695-708. PMID:11994151
- ↑ Lazzaroni JC, Vianney A, Popot JL, Benedetti H, Samatey F, Lazdunski C, Portalier R, Geli V. Transmembrane alpha-helix interactions are required for the functional assembly of the Escherichia coli Tol complex. J Mol Biol. 1995 Feb 10;246(1):1-7. PMID:7853390 doi:http://dx.doi.org/10.1006/jmbi.1994.0058
