Results 111 to 120 of about 18,931 (242)

Forkhead containing transcription factor Albino controls tetrapyrrole-based body pigmentation in planarian

Cell Discovery, 2016
Pigmentation processes occur from invertebrates to mammals. Owing to the complexity of the pigmentary system, in vivo animal models for pigmentation study are limited.
Chen Wang, Xiao-Shuai Han, Fang-Fang Li, S. Huang, Yong-Wen Qin, Xian-Xian Zhao, Qing Jing   +6 more
semanticscholar   +1 more source

Pharmacological chaperone reshapes the energy landscape for folding and aggregation of the prion protein

Nature Communications, 2016
Small-molecule chaperones that can prevent protein misfolding have potential applications for treating diseases such as Alzheimer’s and ALS. Here the authors use high-resolution force spectroscopy to gain insight into the mechanism of action of an iron ...
Amar Nath Gupta, Krishna Neupane, Negar Rezajooei, Leonardo M. Cortez, Valerie L. Sim, Michael T. Woodside   +5 more
doaj   +1 more source

High Fluorescence of Phytochromes Does Not Require Chromophore Protonation

Molecules
Fluorescing proteins emitting in the near-infrared region are of high importance in various fields of biomedicine and applied life sciences. Promising candidates are phytochromes that can be engineered to a small size and genetically attached to a target
Sagie Katz, Hoang Trong Phan, Fabian Rieder, Franziska Seifert, Markus Pietzsch, Jan Laufer, Franz-Josef Schmitt, Peter Hildebrandt   +7 more
doaj   +1 more source

A model for tetrapyrrole synthesis as the primary mechanism for plastid-to-nucleus signaling during chloroplast biogenesis

Frontiers in Plant Science, 2013
Chloroplast biogenesis involves the co-ordinated expression of the chloroplast and nuclear genomes, requiring information to be sent from the developing chloroplasts to the nucleus.
Matthew J. Terry, Matthew J. Terry, Alison G. Smith   +2 more
doaj   +1 more source

Evolutionary Aspects and Regulation of Tetrapyrrole Biosynthesis in Cyanobacteria under Aerobic and Anaerobic Environments

Life, 2015
Chlorophyll a (Chl) is a light-absorbing tetrapyrrole pigment that is essential for photosynthesis. The molecule is produced from glutamate via a complex biosynthetic pathway comprised of at least 15 enzymatic steps.
Y. Fujita, Ryoma Tsujimoto, Rina Aoki
semanticscholar   +1 more source

Alkylpyrroles in a kerogen pyrolysate: Evidence for abundant tetrapyrrole pigments

, 1992
C1-C6 alkylated pyrroles were identified as major constituents of the flash pyrolysate of a kerogen from the Miocene Monterey Formation (California, USA) using gas chromatography with an N-selective detector and gas chromatography-mass spectrometry.
Leeuw, J.W. de, Eglinton, T.I., Sinninghe Damsté, J.S.   +2 more
core  

The Alternative Haem Biosynthesis Pathway: Structure, Function and Properties of Sirohaem Decarboxylase [PDF]

, 2014
Haem, a cyclic tetrapyrrole, is found in organisms from all three domains of life. Haem is a prosthetic group for many proteins involved in essential biological processes such as respiration and oxygen transport.
Palmer, David James
core  

Mechanism of tetrapyrrole chain elongation catalyzed by PBGD.

, 2014
The scheme shows the deamination of porphobilinogen (PBG) to methylene pyrrolenine (MePy), the nucleophilic attack by the B ring of dipyrromethane (DPM) on MePy forming an intermediate that undergoes deprotonation to form a tripyrrole moiety (P3M ...
Meenakshi Pradhan (531967), Gopalakrishnan Bulusu (531969), Navneet Bung (531966), Harini Srinivasan (531968)   +3 more
core   +1 more source

A Modified Pyrrole Biscarbinol Approach to Opp‐A2B2‐Symmetric Benzoporphyrins

ChemistryEurope
In the pursuit of advanced functional materials, π‐extended porphyrin derivatives, particularly β,β‐benzannulated tetrapyrroles, have garnered significant attention due to their unique structural and electronic properties.
Lampros‐Pascal Gazetas, Michael Ruppel, Frank Hampel, Dominik Lungerich, Norbert Jux   +4 more
doaj   +1 more source

Cavity Design via Entrapment of Tetrapyrrole Macrocycles in Sol–Gel Matrices for Catalytic, Optical or Sensoring Functions

Adsorption Science & Technology, 2012
The physicochemical and luminescent properties of tetrapyrrole macrocycles, such as the porphyrins (H 2 P) and phthalocyanines (H 2 Pc), were preserved by trapping or bonding these species in silica matrices.
M.A. García-Sánchez, R.I.Y. Quiroz-Segoviano, F. Rojas, E.C. Menchaca-Campos, S.R. Tello–Solís, L. Munguía-Cortéz, L.A. Díaz-Alejo, E. Salas-Bañales   +7 more
doaj   +1 more source