Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5112
Number of amino acids:480
Molecular Weight:52700.03 Da
Theoretical pI:6.02


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)418.54%
Cysteine CYS (C)61.25%
Glutamic Acid GLU (E)183.75%
Aspartic Acid ASP (D)245%
Glycine GLY (G)377.71%
Phynylalanine PHE (F)255.21%
Isoleucine ILE (I)224.58%
Histidine HIS (H)71.46%
Lysine LYS (K)265.42%
Methionine MET (M)91.88%
Leucine LEU (L)418.54%
Asparagine ASN (N)285.83%
Glutamine GLN (Q)183.75%
Proline PRO (P)183.75%
Serine SER (S)5812.08%
Arginine ARG (R)122.5%
Threonine THR (T)316.46%
Tryptophan TRP (W)91.88%
Valine VAL (V)234.79%
Tyrosine TYR (Y)275.63%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2366
HydrogenH3583
NitrogenN611
OxygenO727
SulphurS15

FormulaC2366H3583N611O727S15
Total Number of Atoms:7302


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):42
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    90105
Absorption 0.1% (=1 g/l)    1.710,   assuming all pairs of CYS residues form cystines

Ext. coefficient    89730
Absorption 0.1% (=1 g/l)    1.703,   assuming all CYS residues are reduced
Aromaticity:0.127

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.41

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.62, 29.38, 22.71]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:73.625
Grand average of hydropathicity (GRAVY):-0.24