Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4546
Number of amino acids:322
Molecular Weight:35744.55 Da
Theoretical pI:9.13


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)195.9%
Cysteine CYS (C)20.62%
Glutamic Acid GLU (E)185.59%
Aspartic Acid ASP (D)134.04%
Glycine GLY (G)257.76%
Phynylalanine PHE (F)123.73%
Isoleucine ILE (I)319.63%
Histidine HIS (H)20.62%
Lysine LYS (K)288.7%
Methionine MET (M)51.55%
Leucine LEU (L)257.76%
Asparagine ASN (N)206.21%
Glutamine GLN (Q)164.97%
Proline PRO (P)237.14%
Serine SER (S)154.66%
Arginine ARG (R)103.11%
Threonine THR (T)123.73%
Tryptophan TRP (W)30.93%
Valine VAL (V)309.32%
Tyrosine TYR (Y)134.04%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1632
HydrogenH2597
NitrogenN423
OxygenO461
SulphurS7

FormulaC1632H2597N423O461S7
Total Number of Atoms:5120


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):31
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    35995
Absorption 0.1% (=1 g/l)    1.007,   assuming all pairs of CYS residues form cystines

Ext. coefficient    35870
Absorption 0.1% (=1 g/l)    1.004,   assuming all CYS residues are reduced
Aromaticity:0.087

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.08

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.40, 25.78, 20.81]

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:100.745
Grand average of hydropathicity (GRAVY):-0.12