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Figure 10
Structure alignment of (a) Hpt proteins/domains and (b) receiver domains listed in Fig. 2[link]. (a) Overall structure of HptB, ZmHP2 and Hpt domain of ArcB, MtHPt1, YPD1 and AHP1 colored red, green, magenta, orange, yellow and wheat, respectively. The common structural motif, the four-helix bundle, is superimposed among these Hpt proteins/domains. Nitro­gen atoms of the active-site histidine are shown as blue sticks; the carbon atoms of the residues are shown as sticks in the same color as the protein. (b) Overall structure of PA1611REC, RR468, VcCheY4, CtrAREC, RR02rec, PhoB REC and BfmRN colored green, magenta, purple blue, orange, dark gray, yellow and pink, respectively. Among these receiver domains, the main (β/α)5 architecture is well superimposed, except helix α4 which is is variable, especially helix α4 of PA1611REC.

IUCrJ
Volume 7| Part 5| September 2020| Pages 934-948
ISSN: 2052-2525
https://doi.org/10.1107/S2052252520009665