User:A. Rahim Zalal/Sandbox 1

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You may include any references to papers as in: the use of JSmol in Proteopedia <ref>DOI 10.1002/ijch.201300024</ref> or to the article describing Jmol <ref>PMID:21638687</ref> to the rescue.
You may include any references to papers as in: the use of JSmol in Proteopedia <ref>DOI 10.1002/ijch.201300024</ref> or to the article describing Jmol <ref>PMID:21638687</ref> to the rescue.
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[[Image:H2A-H2B.png|200px|left|thumb| H2A:H2B dimer (taken from nucleosome model), [[1aoi]]]]
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[[Image:H2A-H2B.png|200px|left|thumb| H2A:H2B dimer (H2A is represented in green while H2B is represented in gray), [[1aoi]]]]
== Function ==
== Function ==

Revision as of 18:27, 2 May 2014

Histone (H2A)

H2A highlighted (green) in nucleosome. The complexed DNA is gray, and the rest of the core proteins are black. 1aoi
H2A highlighted (green) in nucleosome. The complexed DNA is gray, and the rest of the core proteins are black. 1aoi

The histone proteins are a family of proteins that allow for the compaction of DNA into functional units known as nucleosomes, which, through certain organized arrangements, form the chromatin fibers in eukaryotic organisms. The histone family includes the core histone families, H2A (shown highlighted on right), H2B, H3, and H4, as well as the linker histone family, H1. The core histone proteins form the core of the nucleosome, while the linker histones sit on the outside of the nucleosome subunit and assist in interactions with other nucleosomes within the chromatin.

Contents


Structure

H2A:H2B dimer (H2A is represented in green while H2B is represented in gray), 1aoi
H2A:H2B dimer (H2A is represented in green while H2B is represented in gray), 1aoi

Function

Sequence

Protein Primary Sequence

The sequence for histone H2A type 1 (human) is presented here[1]: 

        10         20         30         40         50         60 
MSGRGKQGGK ARAKAKTRSS RAGLQFPVGR VHRLLRKGNY AERVGAGAPV YLAAVLEYLT 

        70         80         90        100        110        120 
AEILELAGNA ARDNKKTRII PRHLQLAIRN DEELNKLLGK VTIAQGGVLP NIQAVLLPKK 

       130 
TESHHKAKGK

Coding DNA Sequence

The coding DNA sequence for the H2A type 1 subunit (human)[2]: 

ENA|AAA63191|AAA63191.1 Homo sapiens (human) histone H2A.1 : Location:1..393
ATGTCTGGACGTGGAAAGCAAGGCGGCAAAGCTCGGGCAAAAGCTAAAACGCGTTCTTCC
AGGGCCGGTCTTCAGTTTCCAGTTGGCCGTGTGCACCGCCTCCTCCGCAAAGGCAACTAC
TCCGAACGAGTCGGGGCCGGCGCTCCAGTGTACCTGGCAGCGGTGCTGGAATATCTGACG
GCCGAGATCTTAGAGCTAGCTGGCAACGCGGCTCGCGACAATAAGAAGACCCGCATCATC
CCGCGCCACCTGCAGCTAGCCATCCGCAACGACGAGGAGCTAAATAAGCTTCTAGGTCGC
GTGACCATCGCGCAGGGCGGTGTCCTGCCCAACATCCAGGCCGTATTGCTGCCTAAGAAG
ACGGAGAGCCACCATAAGGCCAAGGGCAAGTGA

Mechanism

This is a sample scene created with SAT to by Group, and another to make of the protein. You can make your own scenes on SAT starting from scratch or loading and editing one of these sample scenes.


References

  1. ↑ Marzluff WF, Gongidi P, Woods KR, Jin J, Maltais LJ. The human and mouse replication-dependent histone genes. Genomics. 2002 Nov;80(5):487-98. PMID:12408966
  2. ↑ Albig W, Kardalinou E, Drabent B, Zimmer A, Doenecke D. Isolation and characterization of two human H1 histone genes within clusters of core histone genes. Genomics. 1991 Aug;10(4):940-8. PMID:1916825

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A. Rahim Zalal

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