Results 51 to 60 of about 4,516,586 (256)
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 +3 more
wiley +1 more source
The coexistence of ecologically similar species [PDF]
, 2014 textThe biological diversity on planet Earth is astounding. Understanding the origins of this diversity, and how it is maintained, are the twin goals of ecology and evolutionary biology.
Smith, Geneviève Kathleen
core
EcosphereHuman‐induced increase in atmospheric nitrogen (N) deposition has decreased species diversity at the local scale (α diversity) over global grasslands.
Zhengru Ren +6 more
doaj +1 more source
The Asian clam Corbicula fluminea, an accidental host for the European bitterling Rhodeus amarus
Knowledge and Management of Aquatic EcosystemsEuropean bitterling (Rhodeus amarus) embryonic development depends entirely on freshwater mussels of the family Unionidae as host. As almost all the six widespread European unionid mussel species are declining in Southwestern Germany, this could result ...
Pfeiffer Michael +3 more
doaj +1 more source
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 +2 more
wiley +1 more source
A missing link between facilitation and plant species coexistence: nurses benefit generally rare species more than common ones [PDF]
, 2015 1. Positive interactions among plants can increase species richness by relaxing environmental filters and providing more heterogeneous environments. However, it is not known if facilitation could affect coexistence through other mechanisms.
Maestre, Fernando T. +3 more
core +3 more sources
Metastatic niche shaped by host factors influences disseminated cancer cell fate
FEBS Letters, EarlyView.Metastasis is shaped not only by cancer cells but also by the environments they encounter. This review explores how factors such as aging, diet, the microbiome, lifestyle, and environmental exposures remodel organ‐specific niches in the lung, liver, bone, and brain, influencing where metastatic cells survive, remain dormant, or grow, and ultimately ...
Gwennan Delyth Ward +2 more
wiley +1 more source
Biology, 2020 Plant facilitation has a pivotal role in regulating species coexistence, particularly under arid environments. The present study aimed to evaluate the facilitative effect of Calligonum polygonoides L. on its understory plants in coastal habitat.
Ahmed M. Abd-ElGawad +5 more
doaj +1 more source
Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment
Molecular Oncology, EarlyView.This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley +1 more source
Coexistence of fish species with strongly similar life histories - population dynamical feedback forces species to pick sides [PDF]
, 2011 Fish generally grow several orders of magnitude between the larval and adult stage. Many ecological properties of organisms are related to body size, and hence small fish often have very different ecological roles than large conspecifics.
Schellekens, T., Kooten, T., van
core