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Structure of a symmetric photosynthetic reaction center-photosystem

Structure of a symmetric photosynthetic reaction center-photosystem

Reaction centers are pigment-protein complexes that drive photosynthesis by converting light into chemical energy. It is believed that they arose once from a homodimeric protein. The symmetry of a homodimer is broken in heterodimeric reaction-center structures, such as those reported previously. The 2.2-angstrom resolution x-ray structure of the homodimeric reaction center-photosystem from the phototroph Heliobacterium modesticaldum exhibits perfect C2 symmetry. The core polypeptide dimer and two small subunits coordinate 54 bacteriochlorophylls and 2 carotenoids that capture and transfer energy to the electron transfer chain at the center, which performs charge separation and consists of 6 (bacterio)chlorophylls and an iron-sulfur cluster; unlike other reaction centers, it lacks a bound quinone. This structure preserves characteristics of the ancestral reaction center, providing insight into the evolution of photosynthesis.

Science. 2017 Sep 8;357(6355):1021-1025.
doi: 10.1126/science.aan5611. Epub 2017 Jul 27.

 

© 2017 American Association for the Advancement of Science.

  Gisriel C, Sarrou I, Ferlez B, Golbeck JH, Redding KE, Fromme R.

Further Back:

The lysosomal potassium channel TMEM175 adopts a novel tetrameric architecture
The lysosomal potassium channel TMEM175 adopts a novel tetrameric architecture

 

Nature. 2017 Jul 27;547(7664):472-475.
doi: 10.1038/nature23269. Epub 2017 Jul 19.

Structural basis for human respiratory syncytial virus NS1-mediated modulation of host responses
Structural basis for human respiratory syncytial virus NS1-mediated modulation of host responses

 

Nat Microbiol. 2017 Jun 30;2:17101.
doi: 10.1038/nmicrobiol.2017.101.

Ebola virus VP30 and nucleoprotein interactions modulate viral RNA synthesis
Ebola virus VP30 and nucleoprotein interactions modulate viral RNA synthesis

 

Nat Commun. 2017 Jun 8;8:15576.
doi: 10.1038/ncomms15576.

A novel signal transduction protein: Combination of solute binding and tandem PAS-like sensor domains in one polypeptide chain
A novel signal transduction protein: Combination of solute binding and tandem PAS-like sensor domains in one polypeptide chain

 

Protein Sci. 2017 Apr;26(4):857-869.
doi: 10.1002/pro.3134.
Epub 2017 Mar 6.

Potent single-domain antibodies that arrest respiratory syncytial virus fusion protein in its prefusion state
Potent single-domain antibodies that arrest respiratory syncytial virus fusion protein in its prefusion state

 

Nat Commun. 2017 Feb 13;8:14158.
doi: 10.1038/ncomms14158.

Inhibition of RAS function through targeting an allosteric regulatory site
Inhibition of RAS function through targeting an allosteric regulatory site

 

Nat Chem Biol. 2017 Jan;13(1):62-68.
doi: 10.1038/nchembio.2231. Epub 2016 Nov 7.

Structural Basis for Ligand Binding to the Guanidine-I Riboswitch
Structural Basis for Ligand Binding to the Guanidine-I Riboswitch

 

Structure. 2017 Jan 3;25(1):195-202.
doi: 10.1016/j.str.2016.11.020.
Epub 2016 Dec 22.

 

The CDI toxin of Yersinia kristensenii is a novel bacterial member of the RNase A superfamily

A domain in human EXOG converts apoptotic endonuclease to DNA-repair exonuclease

 

Nat Commun. 2017 May 3;8:14959.
doi: 10.1038/ncomms14959.

The CDI toxin of Yersinia kristensenii is a novel bacterial member of the RNase A superfamily

The CDI toxin of Yersinia kristensenii is a novel bacterial member of the RNase A superfamily

 

Nucleic Acids Res. 2017 May 19;45(9):5013-5025. doi: 10.1093/nar/gkx230.

Structural Basis of Mycobacterium tuberculosis Transcription and Transcription Inhibition

Structural Basis of Mycobacterium tuberculosis Transcription and Transcription Inhibition

 

Mol Cell. 2017 Apr 20;66(2):169-179.e8.
doi: 10.1016/j.molcel.2017.03.001.
Epub 2017 Apr 6.

A Sensitive in Vitro High-Throughput Screen To Identify Pan-filoviral Replication Inhibitors Targeting the VP35−NP Interface

A Sensitive in Vitro High-Throughput Screen To Identify Pan-filoviral Replication Inhibitors Targeting the VP35−NP Interface

 

ACS Infect Dis. 2017 Mar 10;3(3):190-198.
doi: 10.1021/acsinfecdis.6b00209.
Epub 2017 Feb 9.

Structure of the active form of human origin recognition complex and its ATPase motor module
Structure of the active form of human origin recognition complex and its ATPase motor module

 

Elife. 2017 Jan 23;6. pii: e20818.
doi: 10.7554/eLife.20818.

Non-classical transpeptidases yield insight into new antibacterials
Non-classical transpeptidases yield insight into new antibacterials

 

Nat Chem Biol. 2017 Jan;13(1):54-61.
doi: 10.1038/nchembio.2237. Epub 2016 Nov 7.

And Even Further Back:

Sidebar_2016_01
2016

 

NPAS1-ARNT and NPAS3-ARNT crystal structures implicate the bHLH-PAS family as multi-ligand binding transcription factors.

 

Bile salt receptor complex activates a pathogenic type III secretion system.

 

Crystal Structure of the FERM-SH2 Module of Human Jak2.

 

Structural Studies of Medicago truncatula Histidinol Phosphate Phosphatase from Inositol Monophosphatase Superfamily Reveal Details of Penultimate Step of Histidine Biosynthesis in Plant.

 

Crystal structure of the human sterol transporter ABCG5/ABCG8.

 

Structural basis of cohesin cleavage by separase.

 

Structure of the voltage-gated two-pore channel TPC1 from Arabidopsis thaliana.

 

Structural and molecular basis for Ebola virus neutralization by protective human antibodies.

Sidebar_2015_01
2015

 

A long-duration dihydroorotate dehydrogenase inhibitor (DSM265) for prevention and treatment of malaria

 

Structural basis of histone H3K27 trimethylation by an active polycomb repressive complex 2

 

A highly stable prefusion RSV F vaccine derived from structural analysis of the fusion mechanism

 

EsxB, a secreted protein from Bacillus anthracis forms two distinct helical bundles

 

Functional Diversity of Haloacid Dehalogenase Superfamily Phosphatases from Saccharomyces cerevisiae

 

An Intrinsically Disordered Peptide from Ebola Virus VP35 Controls Viral RNA Synthesis by Modulating Nucleoprotein-RNA Interactions

 

Crystal structures of alkylperoxo and anhydride intermediates in an intradiol ring-cleaving dioxygenase

 

Sidebar_2016_02
2016

 

Crystal structures of the human elongation factor eEFSec suggest a non-canonical mechanism for selenocysteine incorporation.

 

Structure and function of human Naa60 (NatF), a Golgi-localized bi-functional acetyltransferase.

 

Phosphorylation of spore coat proteins by a family of atypical protein kinases.

 

The mechanism of RNA 5′ capping with NAD+, NADH and desphospho-CoA.

 

The Vaccinia Virus H3 Envelope Protein, a Major Target of Neutralizing Antibodies, Exhibits a Glycosyltransferase Fold and Binds UDP-Glucose.

 

Autopalmitoylation of TEAD proteins regulates transcriptional output of the Hippo pathway.

 

Molecular mechanism of respiratory syncytial virus fusion inhibitors.

Sidebar_2015_02
2015

 

Crystal Structure of the Zorbamycin-Binding Protein ZbmA, the Primary Self-Resistance Element in Streptomyces flavoviridis ATCC21892

 

Structural Basis of Latrophilin-FLRT-UNC5 Interaction in Cell Adhesion

 

Sperm Lysozyme-Like Protein 1 (SLLP1), an intra-acrosomal oolemmal-binding sperm protein, reveals filamentous organization in protein crystal form

 

Structural integration in hypoxia-inducible factors

 

New aminopeptidase from microbial dark matter archaeon

 

A Novel Cofactor-binding Mode in Bacterial IMP Dehydrogenases Explains Inhibitor Selectivity

 

Ebola Virus VP24 Targets a Unique NLS Binding Site on Karyopherin Alpha 5 to Selectively Compete with Nuclear Import of Phos. STAT1