HORDB

ID: hor003984
Uniprot ID: Q9QXU9
Protein name: Big SAAS
Gene name: Pcsk1n
Organism: Rattus norvegicus (Rat)
Family: ProSAAS family
Source: Animal
Expression: Expressed by 12.5 dpc in essentially all differentiating neurons in the mantle layer of the myelencephalon, metencephalon, diencephalon, spinal cord and several sympathetic ganglia. During later stages of prenatal development, widespread expression contin
Disease: NA
Comments: NA
Taxonomy: Rattus (genus), Murinae (subfamily), Muridae (family), Muroidea, Myomorpha (suborder), Rodentia (order), Glires, Euarchontoglires (superorder), Boreoeutheria, Eutheria, Theria, Mammalia (class), Amniota, Tetrapoda, Dipnotetrapodomorpha, Sarcopterygii (superclass), Euteleostomi, Teleostomi, Gnathostomata, Vertebrata, Craniata (subphylum), Chordata (phylum), Deuterostomia, Bilateria, Eumetazoa, Metazoa (kingdom), Opisthokonta, Eukaryota (superkingdom), cellular organisms
GO MF: GO:0004866 endopeptidase inhibitor activity; GO:0004867 serine-type endopeptidase inhibitor activity
GO BP: GO:0002021 response to dietary excess; GO:0007218 neuropeptide signaling pathway; GO:0009409 response to cold; GO:0016486 peptide hormone processing
GO CC: GO:0005576 extracellular region; GO:0005615 extracellular space; GO:0005794 Golgi apparatus; GO:0005802 trans-Golgi network; GO:0030141 secretory granule

Sequence: ARPVKEPRSLSAASAPLAETSTPLRL
Length: 26(34-59)
Propeptide: MAGSPLLCGPRAGGVGLLVLLLLGLLRLPPTLSARPVKEPRSLSAASAPLAETSTPLRLRRAVPRGEAAGAVQELARALAHLLEAERQERARAEAQEAEDQQARVLAQLLRAWGSPRASDPPLAPDDDPDAPAAQLARALLRARLDPAALAAQLVPAPAPAAALRPRPPVYDDGPTGPDVEDAADETPDVDPELLRYLLGRILTGSSEPEAAPAPRRLRRAVDQDLGPEVPPENVLGALLRVKRLENSSPQAPAR
Signal peptide: MAGSPLLCGPRAGGVGLLVLLLLGLLRLPPTLS
Modification: NA
Glycosylation: NA
Mutagenesis: NA

Function: May function in the control of the neuroendocrine secretory pathway. Proposed be a specific endogenous inhibitor of PCSK1 (PubMed:10632593, PubMed:10816562). ProSAAS and Big PEN-LEN, both containing the C-terminal inhibitory domain, but not the processed
Mechanism: NA
Cross BBB: NA
Target: NA
Target Unid: NA
IC50: NA
EC50: NA
ED50: NA
Kd: NA
Half life: NA

Structure: (PDB_ID-from https://www.rcsb.org/; AlphaFold_DB_ID-from https://alphafold.ebi.ac.uk/; hordbxxxxxx_AF2.pdb was predicted structure by AlphaFold2; hordbxxxxxx_ESM.pdb was predicted structure by ESMFold)

hor003984_AF2.pdb

hor003984_ESM.pdb

Mass:	316522	Formula:	C118H204N36O37
Absent amino acids:	CDFGHIMNQWY	Common amino acids:	A
pI:	11.38	Basic residues:	4
Polar residues:	6	Hydrophobic residues:	10
Hydrophobicity:	-26.92	Boman Index:	-4990
Half-Life / Aliphatic Index:	4.4 hour	Aliphatic Index:	90.38
Instability Index:	5954.62	Extinction Coefficient cystines:	0
Absorbance 280nm:	0