Results 81 to 90 of about 41,925 (254)

A Hanks‐type bacterial kinase, PknS, directly phosphorylates the alternative sigma factor EcfK to promote resistance to protist predation

open access: yesThe FEBS Journal, Volume 293, Issue 9, Page 2772-2793, May 2026.
The Xanthomonas citri Hanks‐type kinase PknS autophosphorylates and directly phosphorylates the alternative sigma factor EcfK at five residues. Besides the conserved residue T51 in the σ2 domain, phosphorylation of a residue in the linker between σ2 and σ4 is critical for EcfK activation by promoting its interaction with a positively charged pocket in ...
Lídia dos Passos Lima   +12 more
wiley   +1 more source

The Evolutionary Reorganization of Ontogeny and Origin of Multicellularity [PDF]

open access: yes, 2010
The formation of morphogenetic mechanisms during emergence of multicellularity is discussed in this ...
Dovgal, I. V.
core   +1 more source

Life Cycle Plasticity of Colpoda aspera Fed With Petroleum Tolerant Gram‐Positive and Gram‐Negative Bacteria

open access: yesJournal of Eukaryotic Microbiology, Volume 73, Issue 3, May/June 2026.
ABSTRACT Soil recovery after contamination relies on the surviving microbiota to reconstruct microbial food webs. The ciliate Colpoda aspera and Brevundimonas sp., Rhizobium sp1, Rhizobium sp2 (gram‐negative), Bacillus sp1, Bacillus sp2, and Microbacterium sp.(gram‐positive) remain active after pulses of light petroleum contamination.
Laura Mondragón‐Camarillo   +2 more
wiley   +1 more source

Efecto de fructosa 2,6-bifosfato sobre fosfofructokinasa y fructosa 1,6- bifosfatasa de Dictyostelium discoideum en fase de crecimiento y de diferenciación

open access: yesActa Agronómica, 1990
Se determinaron los parámetros cinéticos y el efecto de fructosa 2,6-bifosfato sobre fosfofructokinasa (PFK) y fructosa 1,6-bifosfatasa (FBP-asa) parcialmente purificadas, obtenidas de homogenados de células vegetativas y diferenciadas de Dictyostelium ...
Ospina G. Blanca Lucía
doaj  

Detection and characterisation of NAD(P)H-diaphorase activity in Dictyostelium discoideum cells (Protozoa)

open access: yesEuropean Journal of Histochemistry, 2012
In Dictyostelium discoideum (D. discoideum), compounds generating nitric oxide (NO) inhibit its aggregation and differentiation without altering cyclic guanosine monophosphate (cGMP) production.
A. Amaroli, M.G. Chessa
doaj   +1 more source

Dictyostelium discoideum: A Model System for Neurological Disorders

open access: yesCells, 2022
Background: The incidence of neurological disorders is increasing due to population growth and extended life expectancy. Despite advances in the understanding of these disorders, curative strategies for treatment have not yet eventuated. In part, this is
Claire Louise Storey   +3 more
doaj   +1 more source

cAMP activates adenylate and guanylate cyclase of Dictyostelium discoideum cells by binding to different classes of cell-surface receptors. A study with extracellular Ca2+ [PDF]

open access: yes, 1985
cAMP induces a transient increase of cAMP and cGMP levels in Dictyostelium discoideum cells. Fast binding experiments reveal three types of cAMP-binding site (S, H and L), which have different off-rates (t0.5, 0.7-15 s) and different affinities (Kd, 15 ...
Brachet   +25 more
core   +3 more sources

Integrating Experimental Imaging and (Quantum‐Deformation)‐Curvature Dynamics in Bleb Morphogenesis

open access: yesEngineering Reports, Volume 8, Issue 4, April 2026.
We propose a (q,τ)$$ \left(q,\tau \right) $$‐fractional geometric flow model for cell blebbing that incorporates hereditary memory and viscoelastic effects in curvature‐driven membrane dynamics. Image‐based measurements of bleb geometry are coupled with fractional evolution equations and validated numerically.
Rabha W. Ibrahim   +2 more
wiley   +1 more source

The Elmo family forms an ancient group of actin-regulating proteins

open access: yesCommunicative & Integrative Biology, 2009
The Elmo protein family members are important mediators of small G protein activity, regulating actin-mediated processes such as chemotaxis and engulfment.
Joseph A. Brzostowski   +4 more
doaj   +1 more source

Iron metabolism and resistance to infection by invasive bacteria in the social amoeba Dictyostelium discoideum

open access: yesFrontiers in Cellular and Infection Microbiology, 2013
Dictyostelium cells are forest soil amoebae, which feed on bacteria and proliferate as solitary cells until bacteria are consumed. Starvation triggers a change in life style, forcing cells to gather into aggregates to form multicellular organisms capable
S. Bozzaro, Simona Buracco, B. Peracino
semanticscholar   +1 more source

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