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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Novel Bacterial Clade Reveals Origin of Form I Rubisco
AU - Banda, Douglas M
AU - Pereira, Jose H
AU - Liu, Albert K
AU - Orr, Douglas
AU - Hammel, Michal
AU - He, Christine
AU - Parry, Martin
AU - Carmo-Silva, Elizabete
AU - Adams, Paul D
AU - Banfield, Jillian F
AU - Shih, Patrick M
PY - 2020/9/1
Y1 - 2020/9/1
N2 - Rubisco sustains the biosphere through the fixation of CO2 into biomass. In plants and cyanobacteria, Form I Rubisco is structurally comprised of large and small subunits, whereas all other Rubisco Forms lack small subunits. Thus, the rise of the Form I complex through the innovation of small subunits represents a key, yet poorly understood, transition in Rubisco’s evolution. Through metagenomic analyses, we discovered a previously uncharacterized clade sister to Form I Rubisco that evolved without small subunits. This clade diverged prior to the evolution of cyanobacteria and the origin of the small subunit; thus, it provides a unique reference point to advance our understanding of Form I Rubisco evolution. Structural and kinetic data presented here reveal how a proto-Form I Rubisco assembled and functioned without the structural stability imparted from small subunits. Our findings provide insight into a key evolutionary transition of the most abundant enzyme on Earth and the predominant entry point for nearly all global organic carbon.
AB - Rubisco sustains the biosphere through the fixation of CO2 into biomass. In plants and cyanobacteria, Form I Rubisco is structurally comprised of large and small subunits, whereas all other Rubisco Forms lack small subunits. Thus, the rise of the Form I complex through the innovation of small subunits represents a key, yet poorly understood, transition in Rubisco’s evolution. Through metagenomic analyses, we discovered a previously uncharacterized clade sister to Form I Rubisco that evolved without small subunits. This clade diverged prior to the evolution of cyanobacteria and the origin of the small subunit; thus, it provides a unique reference point to advance our understanding of Form I Rubisco evolution. Structural and kinetic data presented here reveal how a proto-Form I Rubisco assembled and functioned without the structural stability imparted from small subunits. Our findings provide insight into a key evolutionary transition of the most abundant enzyme on Earth and the predominant entry point for nearly all global organic carbon.
KW - Biogeochemistry
KW - Evolution
KW - Rubisco
KW - SAXS
KW - X-ray crystallography
U2 - 10.1038/s41477-020-00762-4
DO - 10.1038/s41477-020-00762-4
M3 - Journal article
VL - 6
SP - 1158
EP - 1166
JO - Nature Plants
JF - Nature Plants
SN - 2055-026X
ER -