Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4566
Number of amino acids:321
Molecular Weight:35007.01 Da
Theoretical pI:8.92


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)309.35%
Cysteine CYS (C)92.8%
Glutamic Acid GLU (E)144.36%
Aspartic Acid ASP (D)206.23%
Glycine GLY (G)247.48%
Phynylalanine PHE (F)185.61%
Isoleucine ILE (I)195.92%
Histidine HIS (H)41.25%
Lysine LYS (K)195.92%
Methionine MET (M)82.49%
Leucine LEU (L)278.41%
Asparagine ASN (N)144.36%
Glutamine GLN (Q)82.49%
Proline PRO (P)82.49%
Serine SER (S)3410.59%
Arginine ARG (R)226.85%
Threonine THR (T)164.98%
Tryptophan TRP (W)10.31%
Valine VAL (V)206.23%
Tyrosine TYR (Y)61.87%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1530
HydrogenH2457
NitrogenN437
OxygenO468
SulphurS17

FormulaC1530H2457N437O468S17
Total Number of Atoms:4909


Total number of positively charged residues (ARG + LYS):41
Total number of negatively charged residues (ASP + GLU):34
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)    0.427,   assuming all pairs of CYS residues form cystines

Ext. coefficient    14440
Absorption 0.1% (=1 g/l)    0.412,   assuming all CYS residues are reduced
Aromaticity:0.078

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.24

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.35, 24.92, 24.61]

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:83.3021
Grand average of hydropathicity (GRAVY):-0.12