The light-harvesting antenna of higher plant photosystem (PS) I is known to be composed of four different types of light-harvesting complex (LHC) proteins (Lhca1-4). However, the genomic sequence of Arabidopsis thaliana contains open reading frames coding for two additional LHC type proteins (Lhca5-6) that are presumably associated with PSI. While Lhca6 might not be expressed at all, ESTs have been detected for the Lhca5 gene in Arabidopsis and a number of other plant species. Here we demonstrate the presence of the Lhca5 gene product in the thylakoid membrane of Arabidopsis as an additional type of Lhca-protein associated with PSI. Lhca5 seems to be regulated differently from the other LHC proteins since Lhca5 mRNA levels increase under high light conditions. Analyses reported here of Lhca5 in plants lacking individual Lhca1-4 proteins show that it is more abundant in plants lacking Lhca1/4, and suggest that it interacts in a direct physical fashion with Lhca2 or Lhca3. We propose that Lhca5 binds chlorophylls in a similar fashion to the other Lhca proteins and is associated with PSI only in sub-stoichiometric amounts.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1023/B:PLAN.0000040813.05224.94 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Alpha Atlas: Mapping global production of α-emitting radionuclides for targeted alpha therapy.
Nucl Med Biol
December 2024
Life Sciences Division, TRIUMF, BC V6T 2A3 Vancouver, British Columbia, Canada; Department of Chemistry, University of British Columbia, V6T 1Z1 Vancouver, British Columbia, Canada.
Targeted Alpha Therapy has shown great promise in cancer treatment, sparking significant interest over recent decades. However, its broad adoption has been impeded by the scarcity of alpha-emitters and the complexities related to their use. The availability of these radionuclides is often constrained by the intricate production processes and purification, as well as regulatory and logistical challenges.
View Article and Find Full Text PDFMenstrual cycle effects on thermoregulation while exercising in the heat.
J Therm Biol
January 2025
School of Integrative Physiology and Athletic Training, University of Montana, 32 Campus Drive, Missoula, MT, 59812, USA. Electronic address:
Women may be challenged to maintain thermoregulation due to hormonal changes associated with the menstrual cycle. The purpose of this study was to assess the effect of the menstrual cycle phase on core temperature, hydration status, and perceived exertion while exercising under uncompensable heat gain. Eleven eumenorrheic women (24.
View Article and Find Full Text PDFGlobal profiling of alternative splicing in non-small cell lung cancer reveals novel histological and population differences.
Oncogene
January 2025
Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, Bethesda, USA.
Lung cancer is one of the most frequently diagnosed cancers in the US. African-American (AA) men are more likely to develop lung cancer with higher incidence and mortality rates than European-American (EA) men. Herein, we report high-confidence alternative splicing (AS) events from high-throughput, high-depth total RNA sequencing of lung tumors and non-tumor adjacent tissues (NATs) in two independent cohorts of patients with adenocarcinoma (LUAD) and squamous cell carcinoma (LUSC).
View Article and Find Full Text PDFChange in fatigue in patients with ulcerative colitis or Crohn's disease initiating biologic therapy.
Dig Liver Dis
January 2025
Takeda, Brussels, Belgium.
Background: Fatigue is common among patients with inflammatory bowel diseases (IBDs) and is associated with decreased quality of life (QoL).
Aims: Describe fatigue evolution and identify factors associated with fatigue outcomes in patients with ulcerative colitis (UC) or Crohn's disease (CD) initiating biologic treatment.
Methods: Data from adult Belgian patients with UC or CD enrolled in a prospective real-world study were utilized.
On the infodynamics of ramifications in constructal design.
Biosystems
January 2025
University of Coimbra, ADAI, LAETA, Polo II, Rua Luis Reis Santos, Coimbra, 3030-788, Portugal. Electronic address:
Infodynamics is the study of how information behaves and changes within a system during its development. This study investigates the insights that informational analysis can provide regarding the ramifications predicted by constructal design. First, infodynamic neologisms informature, defined as a measure of the amount of information in indeterminate physical systems, and infotropy - contextualized informature representing the degree of transformation of indeterminate physical systems - are introduced.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!