Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4242
Number of amino acids:503
Molecular Weight:56895.12 Da
Theoretical pI:5.7


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)285.57%
Cysteine CYS (C)61.19%
Glutamic Acid GLU (E)5911.73%
Aspartic Acid ASP (D)163.18%
Glycine GLY (G)336.56%
Phynylalanine PHE (F)173.38%
Isoleucine ILE (I)234.57%
Histidine HIS (H)163.18%
Lysine LYS (K)193.78%
Methionine MET (M)10.2%
Leucine LEU (L)458.95%
Asparagine ASN (N)275.37%
Glutamine GLN (Q)326.36%
Proline PRO (P)275.37%
Serine SER (S)479.34%
Arginine ARG (R)428.35%
Threonine THR (T)203.98%
Tryptophan TRP (W)30.6%
Valine VAL (V)305.96%
Tyrosine TYR (Y)122.39%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2470
HydrogenH3908
NitrogenN742
OxygenO792
SulphurS7

FormulaC2470H3908N742O792S7
Total Number of Atoms:7919


Total number of positively charged residues (ARG + LYS):61
Total number of negatively charged residues (ASP + GLU):75
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    34755
Absorption 0.1% (=1 g/l)    0.611,   assuming all pairs of CYS residues form cystines

Ext. coefficient    34380
Absorption 0.1% (=1 g/l)    0.604,   assuming all CYS residues are reduced
Aromaticity:0.064

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 65.18

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.84, 26.64, 26.44]

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:75.5864
Grand average of hydropathicity (GRAVY):-0.78