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Hydramacin-1 is a type of antimicrobial protein. It was first isolated and reproduced in 2008 from cells of the freshwater hydroid Hydra. Only around 60 amino acids long, the protein is unique both in amino acid sequence and tertiary structure, prompting its classification in a new family of proteins, the macins. The protein's unusual structure ...
The genera within this subfamily are divided on the basis of head morphology with the genus Tequatrovirus (Provisional name: T4virus) having a head length of 137 nm and those in the genus Schizotequatrovirus being 111 nm in length. Within the genera on the basis of protein homology the species have been divided into a number of groups.
Monocercomonoides is a genus of flagellate Excavata belonging to the order Oxymonadida.It was established by Bernard V. Travis and was first described as those with "polymastiginid flagellates having three anterior flagella and a trailing one originating at a single basal granule located in front of the anteriorly positioned nucleus, and a more or less well-defined axostyle". [14]
Hydra oligactis. This species can reproduce in three ways: sexual reproduction, budding, and indirectly through regeneration. [11] When hydra reproduce sexually, simple testes, ovaries, or both will develop on the bodies of an individual. Sperm released into the environment by the testes enters the egg within the ovary.
The red dye stains the polyanionic venom proteins found inside the capsule of this partially-discharged nematocyst. A cnidocyte (also known as a cnidoblast ) is an explosive cell containing one large secretory organelle called a cnidocyst (also known as a cnida ( pl. : cnidae )) that can deliver a sting to other organisms.
An alpha-helix with hydrogen bonds (yellow dots) The α-helix is the most abundant type of secondary structure in proteins. The α-helix has 3.6 amino acids per turn with an H-bond formed between every fourth residue; the average length is 10 amino acids (3 turns) or 10 Å but varies from 5 to 40 (1.5 to 11 turns).
Proteins extracted from A. platensis can be used in food as thickening agents [7] or stabilizers for emulsions [8] or foams. [9] A direct comparison indicates that A. platensis protein isolates are more effective at reducing surface tension compared to commonly used animal proteins. [10]
With the availability of high numbers of genomic sequences it becomes feasible to analyze such sequences for coevolving residues.The effectiveness of this approach results from the fact that a mutation in position i of a protein is more likely to be associated with a mutation in position j than with a back-mutation in i if both positions are functionally coupled (e.g. by taking part in an ...