PMID: 7932704Sep 30, 1994Paper

Fibritin encoded by bacteriophage T4 gene wac has a parallel triple-stranded alpha-helical coiled-coil structure

Journal of Molecular Biology
V P Efimov Venyaminov SYu


The bacteriophage T4 late gene wac (whisker's antigen control) encodes a fibrous protein which forms a collar/whiskers complex. Whiskers function as a helper protein for the long tail fibres assembly and plays a role in regulating retraction of the long tail fibres in response to environmental conditions. In this work we show that expression of the cloned wac gene in Escherichia coli yields a protein oligomer of 53 nm length which we call fibritin, and which is able to complement gpwac T4 particles in vitro. CD spectroscopy of fibritin indicates a 90% alpha-helical content, and scanning calorimetry shows that the protein has several distinct domains. The analysis of the 486 amino acid sequence of fibritin reveals three structural components: a 408 amino acid region that contains 12 putative coiled-coil segments with a canonical heptad (a-b-c-d-e-f-g)n substructure where the "a" and "d" positions are preferentially occupied by apolar residues, and the N and C-terminal domains (47 and 29 amino acid residues, respectively) have no heptad substructure. The distribution of hydrophobic residues within heptads is more similar to a triple than to a double coiled-coil. The alpha-helical segments are separated by short "linker" regions, ...Continue Reading


Dec 7, 2010·Virology Journal·Petr G LeimanMichael G Rossmann
Aug 19, 2015·Proceedings of the National Academy of Sciences of the United States of America·Bo HuJun Liu
Jun 1, 1997·Protein Science : a Publication of the Protein Society·E WolfB Berger
Dec 18, 2014·Future Microbiology·Moh Lan Yap, Michael G Rossmann
Feb 26, 2013·Journal of Molecular Biology·Andrei FokineMichael G Rossmann
Dec 1, 1995·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·Y Fujitani, I Kobayashi
Jan 1, 1995·Virus Genes·V P EfimovV V Mesyanzhinov
Jan 1, 1995·Virus Genes·E KutterV Mesyanzhinov
Feb 17, 2006·The Journal of Biological Chemistry·Carlos São-JoséPaulo Tavares
Feb 16, 2002·European Journal of Biochemistry·Sergei P BoudkoVadim V Mesyanzhinov
Jan 4, 2005·Biochemistry. Biokhimii︠a︡·V V MesyanzhinovM M Shneider
Jul 5, 2002·The Journal of Immunology : Official Journal of the American Association of Immunologists·Leslie J MatthewsGeorge P Smith
Jun 18, 2002·Journal of Structural Biology·Matthew R HicksDerek N Woolfson
Oct 3, 1999·Biochemistry·T HeimburgN Geisler

❮ Previous
Next ❯

Related Concepts

Trending Feeds


Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.


Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.


Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.