Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Bacterial Protein Maturation01:26

Bacterial Protein Maturation

Bacterial protein maturation is a tightly regulated process that ensures newly synthesized polypeptides achieve correct functional conformations. This maturation involves a series of modifications, folding events, and quality control steps, often assisted by specialized chaperone proteins.N-Terminal ModificationsThe maturation of bacterial polypeptides begins cotranslationally as the polypeptide exits the ribosome. The first amino acid, N-formylmethionine (fMet), is typically modified at the...
Lipids as Anchors01:32

Lipids as Anchors

In the plasma membrane, the lipids forming the bilayer can also act as an anchor to tether proteins to the membrane. The three main types of lipid anchors found in eukaryotes are – prenyl groups, fatty acyl groups, and glycosylphosphatidylinositol or GPI groups. Prenyl and fatty acyl groups act as anchors on the cytosolic surface of the membrane, whereas GPI anchors proteins on the extracellular side.
The carboxy-terminal of most of the prenylated proteins, such as Ras proteins, contains the...
Post-translational Translocation of Proteins to the RER01:27

Post-translational Translocation of Proteins to the RER

A sizable fraction of proteins destined for ER are first synthesized in the cell cytosol and then transported across the ER membrane–a process called post-translational translocation. Similar to cotranslationally translocated proteins, these proteins also use the Sec translocon complex to enter the ER lumen.
Targeting proteins to the ER
Hsp40 and Hsp70 chaperone molecules bind the translated proteins in the cytosol to prevent their folding. The chaperone binding helps to keep the signal...
Structure of Porins01:21

Structure of Porins

Mitochondria, chloroplasts, and gram-negative bacteria have transmembrane, beta-barrel proteins called porins to mediate the free diffusion of ions and metabolites across the membrane. Mitochondrial porin precursors contain conserved amino acid sequences called beta signals at their C-terminal. Beta signals have a  motif of PoXGXXHyXHy (Po-Polar, X-Any amino acid, G-Glycine, Hy-LargeHydrophobic), which are crucial for precursor recognition to initiate precursor assembly. Beta-barrel precursors...
GPI Anchoring of Proteins in the ER Membrane01:29

GPI Anchoring of Proteins in the ER Membrane

GPI-anchoring is a post-translational, reversible protein modification that is ubiquitous in eukaryotes. Such proteins are primarily present on the exoplasmic leaflet of the plasma membrane.
GPI-anchor structure
A sequence of 11 enzymatic reactions results in the synthesis of the complete GPI anchor consisting of a hydrophobic and a hydrophilic portion. The hydrophobic portion comprises phosphatidylinositol, while the hydrophilic part comprises polar groups like phosphoethanolamine,...
Protein Complex Assembly02:41

Protein Complex Assembly

Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Preserved oxygenation in obese patients receiving protective ventilation during laparoscopic surgery: a randomized controlled study.

Acta anaesthesiologica Scandinavica·2015
Same author

Carotenoid triplet state formation in Rhodobacter sphaeroides R-26 reaction centers exchanged with modified bacteriochlorophyll pigments and reconstituted with spheroidene.

Photosynthesis research·2013
Same author

Reaction centers of Rhodobacter sphaeroides R26 containing C-3 acetyl and vinyl (bacterio)pheophytins at sites HA,B.

Photosynthesis research·2013
Same author

Dynamical transition of protein-hydration water.

Physical review letters·2010
Same author

Stratum corneum lipids, skin barrier function and filaggrin mutations in patients with atopic eczema.

Allergy·2010
Same author

Relative binding affinities of chlorophylls in peridinin-chlorophyll-protein reconstituted with heterochlorophyllous mixtures.

Photosynthesis research·2007

Related Experiment Video

Updated: Jul 7, 2026

Monitoring the Assembly of a Secreted Bacterial Virulence Factor Using Site-specific Crosslinking
11:33

Monitoring the Assembly of a Secreted Bacterial Virulence Factor Using Site-specific Crosslinking

Published on: December 17, 2013

Biliprotein maturation: the chromophore attachment.

H Scheer1, K-H Zhao

  • 1Department Biologie I, Universität München, Menzinger Strasse 67, D-80638 München, Germany.

Molecular Microbiology
|February 21, 2008
PubMed
Summary
This summary is machine-generated.

Researchers are exploring biliproteins, colorful photoreceptors essential for light harvesting. New discoveries in lyase enzymes are advancing research in their assembly, function, and applications in fluorescence labeling.

More Related Videos

Dissecting Multi-protein Signaling Complexes by Bimolecular Complementation Affinity Purification (BiCAP)
06:45

Dissecting Multi-protein Signaling Complexes by Bimolecular Complementation Affinity Purification (BiCAP)

Published on: June 15, 2018

PIP-on-a-chip: A Label-free Study of Protein-phosphoinositide Interactions
10:58

PIP-on-a-chip: A Label-free Study of Protein-phosphoinositide Interactions

Published on: July 27, 2017

Related Experiment Videos

Last Updated: Jul 7, 2026

Monitoring the Assembly of a Secreted Bacterial Virulence Factor Using Site-specific Crosslinking
11:33

Monitoring the Assembly of a Secreted Bacterial Virulence Factor Using Site-specific Crosslinking

Published on: December 17, 2013

Dissecting Multi-protein Signaling Complexes by Bimolecular Complementation Affinity Purification (BiCAP)
06:45

Dissecting Multi-protein Signaling Complexes by Bimolecular Complementation Affinity Purification (BiCAP)

Published on: June 15, 2018

PIP-on-a-chip: A Label-free Study of Protein-phosphoinositide Interactions
10:58

PIP-on-a-chip: A Label-free Study of Protein-phosphoinositide Interactions

Published on: July 27, 2017

Area of Science:

  • Biochemistry
  • Structural Biology
  • Photobiology

Background:

  • Biliproteins are colored photoreceptors with covalently bound bilins.
  • Covalent bilin attachment is crucial for chromoprotein stability and phycobilisome assembly.
  • Research has been limited by the scarcity of known chromophore addition enzymes (lyases).

Purpose of the Study:

  • To investigate new lyase activities and types for biliprotein research.
  • To explore the assembly and organization of light-harvesting systems.
  • To advance applications of biliproteins in areas like fluorescence labeling and protein folding studies.

Main Methods:

  • Characterization of novel lyase enzymes.
  • Homologue identification and analysis.
  • Investigating biliprotein assembly and function in different organisms.

Main Results:

  • Discovery of new lyase activities and enzyme types.
  • Identification of numerous homologues, expanding research scope.
  • Progress in understanding biliprotein roles in cyanobacteria and red algae.

Conclusions:

  • Recent discoveries have revitalized biliprotein research.
  • New insights facilitate studies on phycobilisome and cryptophyte light-harvesting systems.
  • Biliproteins show promise for advanced applications in basic research and biotechnology.