Structural highlights
1s26 is a 6 chain structure with sequence from "bacillus_cereus_var._anthracis"_(cohn_1872)_smith_et_al._1946 "bacillus cereus var. anthracis" (cohn 1872) smith et al. 1946 and Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
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| Ligands: | , , |
| Related: | 1k90, 1lvc |
| Gene: | CYA, PXO1-122 ("Bacillus cereus var. anthracis" (Cohn 1872) Smith et al. 1946), CALM1, CAM1, CALM, CAM , CALM2, CAM2, CAMB , CALM3, CAM3, CAMC (HUMAN) |
| Activity: | Adenylate cyclase, with EC number 4.6.1.1 |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
[CYAA_BACAN] One of the three proteins composing the anthrax toxin, the agent which infects many mammalian species and that may cause death. EF is a calmodulin-dependent adenylyl cyclase that, when associated with PA, causes edema. EF is not toxic by itself and it is required for the survival of germinated spores within macrophages at the early stages of infection. Provokes dramatic elevation of intracellular cAMP levels in the host.
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
Anthrax edema factor (EF) is a key virulence factor secreted by Bacillus anthracis. Here, we report a structure, at 3.0 A resolution, of the catalytic domain of EF (EF3) in complex with calmodulin (CaM) and adenosine 5'-(alpha,beta-methylene)-triphosphate (AMPCPP). Although the binding of the triphosphate of AMPCPP to EF3 can be superimposed on that of previously determined 3'deoxy-ATP (3'dATP) and 2'deoxy 3' anthraniloyl-ATP (2'd3' ANT-ATP) in EF3-CaM, the ribose and the adenine rings of AMPCPP are rotated approximately 105 and 180 degrees, respectively, relative to those of 3'dATP and 2'd3'ANT-ATP. Based on this model, K382 and F586 should play key roles in the recognition of adenine. However, mutations of these residues to alanine either separately or together cause only modest changes in Michaelis-Menten constants and IC50 values of AMPCPP and cAMP. Therefore, this alternate binding mode of the adenosine of AMPCPP binds to EF likely playing only a minor role in ATP binding and in catalysis.
Structure of anthrax edema factor-calmodulin-adenosine 5'-(alpha,beta-methylene)-triphosphate complex reveals an alternative mode of ATP binding to the catalytic site.,Shen Y, Guo Q, Zhukovskaya NL, Drum CL, Bohm A, Tang WJ Biochem Biophys Res Commun. 2004 Apr 30;317(2):309-14. PMID:15063758[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Shen Y, Guo Q, Zhukovskaya NL, Drum CL, Bohm A, Tang WJ. Structure of anthrax edema factor-calmodulin-adenosine 5'-(alpha,beta-methylene)-triphosphate complex reveals an alternative mode of ATP binding to the catalytic site. Biochem Biophys Res Commun. 2004 Apr 30;317(2):309-14. PMID:15063758 doi:10.1016/j.bbrc.2004.03.046
