In molecular biology, the LIM domain-binding protein family is a

family of proteins A protein family is a group of evolutionarily related proteins. In many cases, a protein family has a corresponding gene family, in which each gene encodes a corresponding protein with a 1:1 relationship. The term "protein family" should not be c ...

which binds to the LIM domain of LIM (LIN-11, Isl-1 and MEC-3)

homeodomain proteins A homeobox is a DNA sequence, around 180 base pairs long, that regulates large-scale anatomical features in the early stages of embryonic development. For instance, mutations in a homeobox may change large-scale anatomical features of the full-g ...

which are

transcriptional Transcription is the process of copying a segment of DNA into RNA. The segments of DNA transcribed into RNA molecules that can encode proteins are said to produce messenger RNA (mRNA). Other segments of DNA are copied into RNA molecules calle ...

regulators of development.

Examples

Nuclear LIM interactor (NLI) / LIM domain-binding protein 1 (

LDB1 LIM domain-binding protein 1 is a protein that in humans is encoded by the ''LDB1'' gene. Interactions LDB1 has been shown to interact with LMO4, TCF3, TAL1 __NOTOC__ T-cell acute lymphocytic leukemia protein 1 (i.e. TAL1 but also termed stem c ...

) is located in the nuclei of neuronal cells during development, it is co-expressed with

ISL1 Insulin gene enhancer protein ISL-1 is a protein that in humans is encoded by the ''ISL1'' gene. Function This gene encodes a transcription factor containing two N-terminal LIM domains and one C-terminal homeodomain. The encoded protein play ...

in early

motor neuron A motor neuron (or motoneuron or efferent neuron) is a neuron whose cell body is located in the motor cortex, brainstem or the spinal cord, and whose axon (fiber) projects to the spinal cord or outside of the spinal cord to directly or indirectl ...

differentiation and has a suggested role in the ISL1 dependent development of motor neurons. It is suggested that these

protein Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, respo ...

s act synergistically to enhance transcriptional efficiency by acting as co-factors for LIM homeodomain and Otx class

transcription factor In molecular biology, a transcription factor (TF) (or sequence-specific DNA-binding factor) is a protein that controls the rate of transcription of genetic information from DNA to messenger RNA, by binding to a specific DNA sequence. The fu ...

s both of which have essential roles in development. The ''

Drosophila melanogaster ''Drosophila melanogaster'' is a species of fly (the taxonomic order Diptera) in the family Drosophilidae. The species is often referred to as the fruit fly or lesser fruit fly, or less commonly the "vinegar fly" or "pomace fly". Starting with Ch ...

'' protein Chip is required for segmentation and activity of a remote

wing A wing is a type of fin that produces lift while moving through air or some other fluid. Accordingly, wings have streamlined cross-sections that are subject to aerodynamic forces and act as airfoils. A wing's aerodynamic efficiency is expres ...

margin enhancer. Chip is a ubiquitous

chromosomal A chromosome is a long DNA molecule with part or all of the genetic material of an organism. In most chromosomes the very long thin DNA fibers are coated with packaging proteins; in eukaryotic cells the most important of these proteins are ...

factor required for normal expression of diverse

genes In biology, the word gene (from , ; "...Wilhelm Johannsen coined the word gene to describe the Mendelian units of heredity..." meaning ''generation'' or ''birth'' or ''gender'') can have several different meanings. The Mendelian gene is a ba ...

at many stages of development. It is suggested that Chip cooperates with different LIM domain

proteins Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, respo ...

and other factors to structurally support remote enhancer-promoter interactions.

References

{{InterPro content, IPR002691 Protein families