Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4485
Number of amino acids:444
Molecular Weight:50253.93 Da
Theoretical pI:7.98


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)173.83%
Cysteine CYS (C)122.7%
Glutamic Acid GLU (E)173.83%
Aspartic Acid ASP (D)255.63%
Glycine GLY (G)347.66%
Phynylalanine PHE (F)235.18%
Isoleucine ILE (I)153.38%
Histidine HIS (H)122.7%
Lysine LYS (K)224.95%
Methionine MET (M)153.38%
Leucine LEU (L)388.56%
Asparagine ASN (N)347.66%
Glutamine GLN (Q)71.58%
Proline PRO (P)204.5%
Serine SER (S)378.33%
Arginine ARG (R)224.95%
Threonine THR (T)357.88%
Tryptophan TRP (W)122.7%
Valine VAL (V)296.53%
Tyrosine TYR (Y)184.05%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2237
HydrogenH3403
NitrogenN609
OxygenO660
SulphurS27

FormulaC2237H3403N609O660S27
Total Number of Atoms:6936


Total number of positively charged residues (ARG + LYS):44
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    93570
Absorption 0.1% (=1 g/l)    1.862,   assuming all pairs of CYS residues form cystines

Ext. coefficient    92820
Absorption 0.1% (=1 g/l)    1.847,   assuming all CYS residues are reduced
Aromaticity:0.119

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.05

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.41, 28.15, 19.59]

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:69.3243
Grand average of hydropathicity (GRAVY):-0.36