Leucine rich repeat containing 7 also known as LRRC7, Densin-180, or LAP1 is a protein

Protein

Proteins are biochemical compounds consisting of one or more polypeptides typically folded into a globular or fibrous form, facilitating a biological function. A polypeptide is a single linear polymer chain of amino acids bonded together by peptide bonds between the carboxyl and amino groups of...

 which in humans is encoded by the LRRC7 gene

Gene

A gene is a molecular unit of heredity of a living organism. It is a name given to some stretches of DNA and RNA that code for a type of protein or for an RNA chain that has a function in the organism. Living beings depend on genes, as they specify all proteins and functional RNA chains...

.

Structure

Found to be densely associated to the postsynaptic density

Postsynaptic density

The postsynaptic density is a protein dense specialization attached to the postsynaptic membrane. PSDs were originally identified by electron microscopy as an electron-dense region at the membrane of a postsynaptic neuron...

 (PSD), it has been characterised as a 188 kDa (originally thought to be 180 kDa, hence nomenclature), 1495 residues long, brain-specific protein containing 16 leucine-rich repeat

Leucine-rich repeat

A leucine-rich repeat is a protein structural motif that forms an α/β horseshoe fold. It is composed of repeating 20–30 amino acid stretches that are unusually rich in the hydrophobic amino acid leucine...

s (LRRs) within the 500 N-terminal residues, and one Psd95/Discs large/Zona occludens (PDZ

PDZ domain

The PDZ domain is a common structural domain of 80-90 amino-acids found in the signaling proteins of bacteria, yeast, plants, viruses and animals...

) domain within the 200 C-terminal residues. Originally postulated to have an apparent transmembrane domain, it has now been shown that the protein has numerous phosphorylation

Phosphorylation

Phosphorylation is the addition of a phosphate group to a protein or other organic molecule. Phosphorylation activates or deactivates many protein enzymes....

 sites both N- and C-term of this domain, and that protein is therefore cytoplasm

Cytoplasm

The cytoplasm is a small gel-like substance residing between the cell membrane holding all the cell's internal sub-structures , except for the nucleus. All the contents of the cells of prokaryote organisms are contained within the cytoplasm...

ic; palmitoylation

Palmitoylation

S-Palmitoylation is the covalent attachment of fatty acids, such as palmitic acid, to cysteine residues of membrane proteins. The precise function of palmitoylation depends on the particular protein being considered. Palmitoylation enhances the hydrophobicity of proteins and contributes to their...

is thought to occur near the N-terminus of the protein which would account for localisation of the protein at the PSD.

Further reading