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Protein family
BRN-3 is a group of related transcription factors in the POU family .[ 1] They are also known as class 4 POU domain homeobox proteins.
There are three BRN-3 proteins encoded by the following genes:
The BRN or Brn prefix is an abbreviation for "brain"; the longer name is "Brain-specific homeobox". The name of the group may also be abbreviated as POU4 , Pou4 , POU IV , or POU-IV .
(1) Basic domains
(1.1) Basic leucine zipper (bZIP )(1.2) Basic helix-loop-helix (bHLH )
Group A Group B Group C bHLH-PAS Group D Group E Group F bHLH-COE
(1.3) bHLH-ZIP (1.4) NF-1 (1.5) RF-X (1.6) Basic helix-span-helix (bHSH)
(2) Zinc finger DNA-binding domains
(2.1) Nuclear receptor (Cys4 )
subfamily 1 subfamily 2 subfamily 3 subfamily 4 subfamily 5 subfamily 6 subfamily 0
(2.2) Other Cys4 (2.3) Cys2 His2 (2.4) Cys6 (2.5) Alternating composition (2.6) WRKY
(4) β-Scaffold factors with minor groove contacts
(0) Other transcription factors