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Cytochrome bd-type quinol oxidases catalyze the reduction of molecular oxygen to water in the respiratory chain of many human-pathogenic bacteria. They are structurally unrelated to mitochondrial cytochrome c oxidases and are therefore a prime target for the development of antimicrobial drugs. We determined the structure of the cytochrome bd-I oxidase by single-particle cryo-electron microscopy to a resolution of 2.7 angstroms. Our structure contains a previously unknown accessory subunit CydH, the L-subfamily-specific Q-loop domain, a structural ubiquinone-8 cofactor, an active-site density interpreted as dioxygen, distinct water-filled proton channels, and an oxygen-conducting pathway. Comparison with another cytochrome bd oxidase reveals structural divergence in the family, including rearrangement of high-spin hemes and conformational adaption of a transmembrane helix to generate a distinct oxygen-binding site.
This article was published in the following journal.
Name: Science (New York, N.Y.)
The enzyme β-Ketoacyl ACP synthase I (KasA) is a potent drug target in mycolic acid pathway of Mycobacterium tuberculosis (Mtb). In the present study, we investigated the structural dynamics of wild-...
Fumarase C catalyzes the reversible conversion of fumarate to S-malate. Previous structural investigations within the superfamily have reported a dynamic structural segment, termed the SS Loop. To dat...
The Spt-Ada-Gcn5-acetyltransferase (SAGA) deubiquitinating module (DUBm), comprising Ubp8, Sgf11, Sus1, and Sgf73, functions as a deubiquitinase. Data from recent biomolecular experiments have indicat...
RNA represents an extremely promising and yet challenging therapeutic target. Here, we report the design of a series of C-nucleosides as original RNA binders. Some of them bind strongly and selectivel...
Mammalian copper-containing amine oxidases (CAOs), encoded by four genes (AOC1-4) and catalyzing the oxidation of primary amines to aldehydes, regulate many biological processes and are linked to vari...
This is a single site study to determine the structural efficacy of sarilumab when administered to biologic naive patients with active rheumatoid arthritis
Most patients with complex congenital heart disease and cardiomyopathy from acquired heart disease have reduced exercise capacity. Exercise capacity is associated with respiratory muscle s...
The purpose of this study is to evaluate the efficacy and safety of INCB054828 in subjects with myeloid/lymphoid neoplasms with fibroblast growth factor receptor (FGFR) 1 rearrangement.
This study will evaluate the efficacy of crizotinib as induction therapy in participants with surgically resectable ALK rearrangement, ROS1 rearrangement, or MET exon 14 mutation positive ...
This project aimed to optimize the therapeutic strategy for structural heart disease by choosing optimal treatment, such as,surgical treatment,interventional and surgery combined with inte...
The largest of the three prokaryotic initiation factors with a molecular size of approximately 80 kD. It functions in the transcription initiation process by promoting the binding of formylmethionine-tRNA to the P-site of the 30S ribosome and by preventing the incorrect binding of elongator tRNA to the translation initiation site.
A prokaryotic ATP-dependent protease that plays a role in the degradation of many abnormal proteins. It is a tetramer of 87-kDa subunits, each of which contains a proteolytic site and a ATP-binding site.
The smallest of the three prokaryotic initiation factors with a molecular size of approximately 8 kD. It binds near the A-site of the 30S subunit of RIBOSOMES and may play a role in preventing premature addition of aminoacyl-tRNA-linked PEPTIDE ELONGATION FACTOR TU to the ribosome during the initiation of a peptide chain (PEPTIDE CHAIN INITIATION, TRANSLATIONAL).
NADPH oxidases that contain two additional EF HAND MOTIFS and an N-terminal PEROXIDASE domain. They are expressed by THYROCYTES and EPITHELIAL CELLS of the kidney, liver, trachea, lung, and glandular tissues such as the testis, pancreas, and prostate. They are critical for the activity of THYROID PEROXIDASE and play a role in the production of thyroid hormones; they may also have antimicrobial activity through the generation of REACTIVE OXYGEN SPECIES.
Ordered rearrangement of T-cell variable gene regions coding for the antigen receptors.
Asthma COPD Cystic Fibrosis Pneumonia Pulmonary Medicine Respiratory Respiratory tract infections (RTIs) are any infection of the sinuses, throat, airways or lungs. They're usually caused by viruses, but they can also ...