Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5515
Number of amino acids:330
Molecular Weight:37067.86 Da
Theoretical pI:9.02


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)103.03%
Cysteine CYS (C)92.73%
Glutamic Acid GLU (E)103.03%
Aspartic Acid ASP (D)185.45%
Glycine GLY (G)195.76%
Phynylalanine PHE (F)164.85%
Isoleucine ILE (I)206.06%
Histidine HIS (H)72.12%
Lysine LYS (K)267.88%
Methionine MET (M)41.21%
Leucine LEU (L)5215.76%
Asparagine ASN (N)206.06%
Glutamine GLN (Q)92.73%
Proline PRO (P)185.45%
Serine SER (S)3410.3%
Arginine ARG (R)113.33%
Threonine THR (T)247.27%
Tryptophan TRP (W)51.52%
Valine VAL (V)82.42%
Tyrosine TYR (Y)103.03%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1675
HydrogenH2647
NitrogenN437
OxygenO484
SulphurS13

FormulaC1675H2647N437O484S13
Total Number of Atoms:5256


Total number of positively charged residues (ARG + LYS):37
Total number of negatively charged residues (ASP + GLU):28
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    42900
Absorption 0.1% (=1 g/l)    1.157,   assuming all pairs of CYS residues form cystines

Ext. coefficient    42400
Absorption 0.1% (=1 g/l)    1.144,   assuming all CYS residues are reduced
Aromaticity:0.094

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.26

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.64, 27.58, 23.03]

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:95.1516
Grand average of hydropathicity (GRAVY):-0.17