Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5678
Number of amino acids:320
Molecular Weight:35221.82 Da
Theoretical pI:9.2


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)206.25%
Cysteine CYS (C)20.63%
Glutamic Acid GLU (E)195.94%
Aspartic Acid ASP (D)113.44%
Glycine GLY (G)268.13%
Phynylalanine PHE (F)144.38%
Isoleucine ILE (I)299.06%
Histidine HIS (H)20.63%
Lysine LYS (K)247.5%
Methionine MET (M)51.56%
Leucine LEU (L)278.44%
Asparagine ASN (N)165%
Glutamine GLN (Q)175.31%
Proline PRO (P)237.19%
Serine SER (S)216.56%
Arginine ARG (R)134.06%
Threonine THR (T)134.06%
Tryptophan TRP (W)10.31%
Valine VAL (V)268.13%
Tyrosine TYR (Y)113.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1597
HydrogenH2555
NitrogenN421
OxygenO459
SulphurS7

FormulaC1597H2555N421O459S7
Total Number of Atoms:5039


Total number of positively charged residues (ARG + LYS):37
Total number of negatively charged residues (ASP + GLU):30
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    22015
Absorption 0.1% (=1 g/l)    0.625,   assuming all pairs of CYS residues form cystines

Ext. coefficient    21890
Absorption 0.1% (=1 g/l)    0.621,   assuming all CYS residues are reduced
Aromaticity:0.081

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.04

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.75, 26.88, 22.19]

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:98.0625
Grand average of hydropathicity (GRAVY):-0.11