Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4193
Number of amino acids:330
Molecular Weight:35858.54 Da
Theoretical pI:4.88


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3410.3%
Cysteine CYS (C)82.42%
Glutamic Acid GLU (E)144.24%
Aspartic Acid ASP (D)278.18%
Glycine GLY (G)206.06%
Phynylalanine PHE (F)206.06%
Isoleucine ILE (I)113.33%
Histidine HIS (H)41.21%
Lysine LYS (K)144.24%
Methionine MET (M)113.33%
Leucine LEU (L)267.88%
Asparagine ASN (N)175.15%
Glutamine GLN (Q)123.64%
Proline PRO (P)123.64%
Serine SER (S)298.79%
Arginine ARG (R)164.85%
Threonine THR (T)185.45%
Tryptophan TRP (W)10.3%
Valine VAL (V)309.09%
Tyrosine TYR (Y)61.82%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1567
HydrogenH2466
NitrogenN430
OxygenO495
SulphurS19

FormulaC1567H2466N430O495S19
Total Number of Atoms:4977


Total number of positively charged residues (ARG + LYS):30
Total number of negatively charged residues (ASP + GLU):41
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    14940
Absorption 0.1% (=1 g/l)    0.417,   assuming all pairs of CYS residues form cystines

Ext. coefficient    14440
Absorption 0.1% (=1 g/l)    0.403,   assuming all CYS residues are reduced
Aromaticity:0.082

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.71

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.48, 23.64, 25.76]

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:80.3939
Grand average of hydropathicity (GRAVY):-0.07