Results 71 to 80 of about 3,910,498 (310)

Heme-oxygenases during erythropoiesis in K562 and human bone marrow cells. [PDF]

PLoS ONE, 2011
In mammalian cells, heme can be degraded by heme-oxygenases (HO). Heme-oxygenase 1 (HO-1) is known to be the heme inducible isoform, whereas heme-oxygenase 2 (HO-2) is the constitutive enzyme.
Liliane R Alves, Elaine S Costa, Marcos H F Sorgine, Maria Clara L Nascimento-Silva, Cristina Teodosio, Paloma Bárcena, Hugo C Castro-Faria-Neto, Patrícia T Bozza, Alberto Orfao, Pedro L Oliveira, Clarissa M Maya-Monteiro   +10 more
doaj   +1 more source

Structural and biochemical analysis of a B12 superbinder

FEBS Letters, EarlyView.
BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices, Jacob J. Whittaker, Dirk J. Slotboom, Albert Guskov   +3 more
wiley   +1 more source

Trimethylamine N-oxide generation process was influenced by the proportion and source of macronutrients in the diet

Food Science and Human Wellness
Trimethylamine N-oxide (TMAO) is a risk factor of various chronic diseases, which was produced by metabolism from precursors to trimethylamine (TMA) in gut and the oxidation from TMA in liver.
Chengcheng Wang, Xuefeng Duan, Xiaoyue Li, Jinyue Yang, Changhu Xue, Teruyoshi Yanagita, Tiantian Zhang, Yuming Wang   +7 more
doaj   +1 more source

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

FEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav, Bogdan I. Florea, Sebastian Geibel   +2 more
wiley   +1 more source

Mitochondrial protein import [PDF]

, 1988
Transport of nuclear-encoded precursor proteins into mitochondria includes proteolytic cleavage of aminoterminal targeting sequences in the mitochondrial matrix. We have isolated the processing activity from Neurospora crassa.
Hawlitschek, Gerhard, Schneider, Helmut, Tropschug, Maximilian, Hartl, Franz-Ulrich, Neupert, Walter, Schmidt, Bernd   +5 more
core   +1 more source

Structural determinants of Arabidopsis thaliana Hyponastic leaves 1 function in vivo. [PDF]

PLoS ONE, 2014
MicroRNAs have turned out to be important regulators of gene expression. These molecules originate from longer transcripts that are processed by ribonuclease III (RNAse III) enzymes. Dicer proteins are essential RNAse III enzymes that are involved in the
Paula Burdisso, Fernando Milia, Arnaldo L Schapire, Nicolás G Bologna, Javier F Palatnik, Rodolfo M Rasia   +5 more
doaj   +1 more source

From junk to function — How weak selection in eukaryotes builds new parts and drives genomic complexity

FEBS Letters, EarlyView.
How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley   +1 more source

Peroxisomal membrane proteins insert into the endoplasmic reticulum [PDF]

, 2010
We show that a comprehensive set of 16 peroxisomal membrane proteins (PMPs) encompassing all types of membrane topologies first target to the endoplasmic reticulum (ER) in Saccharomyces cerevisiae.
Sub Cellular Protein Chemistry, van der Zand, A., Tabak, H.F., Braakman, L.J., Cellular Protein Chemistry   +4 more
core   +1 more source

Emerin anchors Msx1 and its protein partners at the nuclear periphery to inhibit myogenesis

Cell & Bioscience, 2019
Background Previous studies have shown that in myogenic precursors, the homeoprotein Msx1 and its protein partners, histone methyltransferases and repressive histone marks, tend to be enriched on target myogenic regulatory genes at the nuclear periphery.
Zhangjing Ma, Huiyuan Shi, Yi Shen, Huixia Li, Yu Yang, Jiange Yang, Hui Zhao, Gang Wang, Jingqiang Wang   +8 more
doaj   +1 more source

Structural basis of soluble membrane attack complex packaging for clearance

Nature Communications, 2021
To prevent unregulated complement activation, extracellular chaperones capture soluble precursors to the membrane attack complex (sMAC). Here, structural analysis of sMAC reveals how clusterin recognizes heterogeneous sMAC complexes and inhibits ...
Anaïs Menny, Marie V. Lukassen, Emma C. Couves, Vojtech Franc, Albert J. R. Heck, Doryen Bubeck   +5 more
doaj   +1 more source