LRCOL1 (Leucine Rich Colipase Like 1) is a protein-coding gene located on human chromosome 12q24.33[6]. The gene is identified by multiple database identifiers including HGNC: 44160, NCBI Gene: 100507055, Ensembl: ENSG00000204583, and UniProtKB/Swiss-Prot: A6NCL2[1]. The gene encodes the Leucine-rich colipase-like protein 1, which represents a paralog of the CLPS (colipase) gene[1].
LRCOL1 is predicted to enable enzyme activator activity[1][10][12]. This functional annotation suggests the protein plays a regulatory role in enzymatic processes, though the specific enzymes it activates remain to be fully characterized. The enzyme activator function indicates LRCOL1 likely modulates the activity of digestive or metabolic enzymes rather than possessing direct catalytic activity itself.
The gene is predicted to be involved in two primary biological processes[1][10][12]:
Additionally, LRCOL1 is predicted to be involved in response to food[11], suggesting it may be regulated by nutritional status or participate in metabolic responses to dietary intake.
LRCOL1 is predicted to be located in the extracellular region[1][11][12]. This extracellular localization is consistent with its proposed role in digestion, as digestive enzymes and their regulatory proteins typically function in the extracellular environment of the gastrointestinal tract.
LRCOL1 has 6 transcripts (splice variants) with varying characteristics[3]:
| Transcript | Length | Protein | Biotype | Status |
|---|---|---|---|---|
| LRCOL1-201 | 1004 bp | 159 aa | Protein coding | MANE Select, Canonical |
| LRCOL1-204 | 921 bp | 61 aa | Nonsense mediated decay | TSL:5 |
| LRCOL1-206 | 910 bp | 46 aa | Nonsense mediated decay | TSL:1 |
| LRCOL1-203 | 825 bp | 139 aa | Nonsense mediated decay | TSL:5 |
| LRCOL1-205 | 744 bp | No protein | Retained intron | TSL:5 |
| LRCOL1-202 | 580 bp | No protein | Retained intron | TSL:4 |
The canonical transcript (LRCOL1-201) produces a 159 amino acid protein and is designated as the MANE Select transcript, indicating it represents the most biologically relevant isoform[3].
Currently, no three-dimensional crystal structure is available for the LRCOL1 protein (UniProt ID: A6NCL2)[7]. The protein contains leucine-rich domains, which are characteristic structural motifs often involved in protein-protein interactions. The gene has 68 orthologues across different species and 3 paralogues within the human genome[3], suggesting evolutionary conservation and functional importance.
The search results provided do not contain specific information regarding disease associations with LRCOL1 mutations or dysregulation. However, given its predicted roles in digestion and lipid metabolism, potential disease relevance could involve gastrointestinal or metabolic disorders, though this remains speculative without direct evidence.
Several aspects of LRCOL1 biology require further investigation:
The current understanding of LRCOL1 remains largely predictive based on sequence homology and computational annotation, highlighting the need for experimental validation of its proposed functions.