Cannabaceae

thcscience_admin
12CA5 Fv-clasp fragment (green, cyan) with its antigen peptide, YPYDVPDYA (magenta), which is used as HA tag. Image created with PyMOL from PDB: 5XCS​.

Human influenza hemagglutinin (HA) is a surface glycoprotein required for the infectivity of the human influenza virus. The HA-tag is derived from the HA-molecule corresponding to amino acids 98-106. HA-tag has been extensively used as a general epitope tag in expression vectors. [1] Many recombinant proteins have been engineered to express the HA-tag, which does not generally appear to interfere with the bioactivity or the biodistribution of the recombinant protein. This tag facilitates the detection, isolation and purification of the protein of interest.[2]

The HA-tag is not suitable for detection or purification of proteins from apoptotic cells since it is cleaved by Caspase-3 and / or Caspase-7 after its sequence DVPD, causing it to lose its immunoreactivity.[3] Labeling of endogenous proteins with HA-tag using CRISPR was recently accomplished in-vivo in differentiated neurons.[4]

Sequence[edit]

The DNA sequences for the HA-tag include: 5'-TAC-CCA-TAC-GAT-GTT-CCA-GAT-TAC-GCT-3' or 5'-TAT-CCA-TAT-GAT-GTT-CCA-GAT-TAT-GCT-3'. The resulting amino acid sequence is YPYDVPDYA (Tyr-Pro-Tyr-Asp-Val-Pro-Asp-Tyr-Ala).[citation needed]

See also[edit]

References[edit]

  1. ^ Field J, Nikawa J, Broek D, MacDonald B, Rodgers L, Wilson IA, Lerner RA, Wigler M (1988). "Purification of a RAS-responsive adenylyl cyclase complex from Saccharomyces cerevisiae by use of an epitope addition method". Mol Cell Biol. 8 (5): 2159–65. doi:10.1128/mcb.8.5.2159-2165.1988. PMC 363397. PMID 2455217.
  2. ^ "Anti-HA Tag Antibody Updated 28/10/2021". Merck Millipore.
  3. ^ Schembri L, Dalibart R, Tomasello F, Legembre P, Ichas F, De Giorgi F (February 2007). "The HA tag is cleaved and loses immunoreactivity during apoptosis". Nature Methods. 4 (2): 107–8. doi:10.1038/nmeth0207-107. PMID 17264856. S2CID 32173039.
  4. ^ Mikuni T, Nishiyama J, Sun Y, Kamasawa N, Yasuda R (2016). "High Throughput, High Resolution Mapping of Protein Localization in Mammalian Brain by In Vivo Genome Editing". Cell. 165 (7): 1803–1817. doi:10.1016/j.cell.2016.04.044. PMC 4912470. PMID 27180908.

Further reading[edit]

source: https://en.wikipedia.org/wiki/HA-tag

One thought on “Cannabaceae”

  1. Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
    View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction

Leave a Reply