Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5317
Number of amino acids:330
Molecular Weight:36137.43 Da
Theoretical pI:6.6


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)278.18%
Cysteine CYS (C)92.73%
Glutamic Acid GLU (E)133.94%
Aspartic Acid ASP (D)164.85%
Glycine GLY (G)247.27%
Phynylalanine PHE (F)185.45%
Isoleucine ILE (I)175.15%
Histidine HIS (H)51.52%
Lysine LYS (K)61.82%
Methionine MET (M)41.21%
Leucine LEU (L)3911.82%
Asparagine ASN (N)236.97%
Glutamine GLN (Q)92.73%
Proline PRO (P)226.67%
Serine SER (S)206.06%
Arginine ARG (R)226.67%
Threonine THR (T)216.36%
Tryptophan TRP (W)41.21%
Valine VAL (V)257.58%
Tyrosine TYR (Y)61.82%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1615
HydrogenH2540
NitrogenN448
OxygenO468
SulphurS13

FormulaC1615H2540N448O468S13
Total Number of Atoms:5084


Total number of positively charged residues (ARG + LYS):28
Total number of negatively charged residues (ASP + GLU):29
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    31440
Absorption 0.1% (=1 g/l)    0.870,   assuming all pairs of CYS residues form cystines

Ext. coefficient    30940
Absorption 0.1% (=1 g/l)    0.856,   assuming all CYS residues are reduced
Aromaticity:0.085

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.74

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.03, 26.97, 25.15]

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:96.3334
Grand average of hydropathicity (GRAVY):0.06