Expression and purification of the heme exporter FLVCR1a.

Protein Expr Purif

Department of Biology and Biotechnology "Lazzaro Spallanzani", University of Pavia, Via Ferrata 9, 27100, Pavia, Italy. Electronic address:

Published: August 2020

AI Article Synopsis

  • The heme exporter FLVCR1a is crucial for maintaining heme balance in cells and is implicated in various diseases, including certain conditions affecting humans.
  • Originally discovered as a receptor for the Feline Leukemia Virus, FLVCR1a has been linked to mutations that can result in serious neurological and sensory disorders.
  • This study presents a new reliable protocol for producing the FLVCR1a protein in pure form, which is essential for further research into its molecular function and the impact of disease-related mutations.

Article Abstract

With many crucial roles in enzymatic aerobic metabolism, the concentration of the heme must be tightly regulated. The heme exporter Feline Leukemia Virus sub-group C Receptor 1a (FLVCR1a), an integral membrane protein with twelve transmembrane helices, is a key player in the maintenance of cellular heme homeostasis. It was first identified as the host receptor for the Feline Leukemia Virus sub-group C (FeLV-C), a retrovirus causing hematological abnormalities in cats and other felines. Mutations in the Flvcr1 were later identified in human patients affected by Posterior Column Ataxia and Retinitis Pigmentosa (PCARP) and Hereditary Sensory and Autonomic Neuropathies (HSANs). Despite being an essential component in heme balance, currently there is a lack in the understanding of its function at the molecular level, including the effect of disease-causing mutations on protein function and structure. Therefore, there is a need for protocols to achieve efficient recombinant production yielding milligram amounts of highly pure protein to be used for biochemical and structural studies. Here, we report the first FLVCR1a reliable protocol suitable for both antibody generation and structural characterisation.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.pep.2020.105637DOI Listing

Publication Analysis

Top Keywords

heme exporter
8
feline leukemia
8
leukemia virus
8
virus sub-group
8
heme
5
expression purification
4
purification heme
4
exporter flvcr1a
4
flvcr1a crucial
4
crucial roles
4

Similar Publications

HO-1 impairs the efficacy of radiotherapy by redistributing cGAS and STING in tumors.

J Clin Invest

December 2024

State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Guangdong Provincial Clinical Research Center for Cancer.

Article Synopsis
  • Type I IFNs play a crucial role in the effectiveness of radiotherapy (RT), but tumor cells have developed mechanisms to inhibit their production, which is not fully understood.
  • A study using CRISPR screening identified hemeoxygenase 1 (HO-1) as a key regulator that disrupts the STING pathway and impairs the production of IFN-I during RT.
  • Targeting HO-1 could improve the efficacy of RT by enhancing immune response, as high levels of HO-1 were linked to worse patient outcomes post-RT in various tumors.
View Article and Find Full Text PDF

The cyclic GMP-AMP synthase/stimulator of interferon genes (cGAS/STING) pathway is a critical driver of type I interferon (IFN-I) and antitumor CD8+ T cell responses after radiotherapy (RT). In this issue of the JCI, two reports describe mechanisms that restrained STING signaling and abrogated antitumor immunity after RT. Wen, Wang, and colleagues discovered that IFN-I mediated the induction of YTHDF1, an RNA N6-methyladenosine-binding protein, in DCs after RT promoted cathepsin-mediated STING degradation.

View Article and Find Full Text PDF

A widespread family of ribosomal peptide metallophores involved in bacterial adaptation to metal stress.

Proc Natl Acad Sci U S A

December 2024

Univ. Lille, CNRS, INSERM, Centre Hospitalier Universitaire de Lille, Institut Pasteur de Lille, U1019 - UMR 9017 - Center for Infection and Immunity of Lille, Lille F-59000, France.

Ribosomally synthesized and posttranslationally modified peptides (RiPPs) are a structurally diverse group of natural products that bacteria employ in their survival strategies. Herein, we characterized the structure, the biosynthetic pathway, and the mode of action of a RiPP family called bufferins. With thousands of homologous biosynthetic gene clusters throughout the bacterial phylogenetic tree, bufferins form by far the largest family of RiPPs modified by multinuclear nonheme iron-dependent oxidases (MNIO, DUF692 family).

View Article and Find Full Text PDF

Host iron deficiency is protective against severe malaria as the human malaria parasite depends on bioavailable iron from its host to proliferate. The essential pathways of iron acquisition, storage, export, and detoxification in the parasite differ from those in humans, as orthologs of the mammalian transferrin receptor, ferritin, or ferroportin, and a functional heme oxygenase are absent in . Thus, the proteins involved in these processes may be excellent targets for therapeutic development, yet remain largely unknown.

View Article and Find Full Text PDF

malaria parasites invade and multiply inside red blood cells (RBCs), the most iron-rich compartment in humans. Like all cells, requires nutritional iron to support essential metabolic pathways, but the critical mechanisms of iron acquisition and trafficking during RBC infection have remained obscure. Parasites internalize and liberate massive amounts of heme during large-scale digestion of RBC hemoglobin within an acidic food vacuole (FV) but lack a heme oxygenase to release porphyrin-bound iron.

View Article and Find Full Text PDF

Want 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!