Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5250
Number of amino acids:284
Molecular Weight:30433.21 Da
Theoretical pI:5.88


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)279.51%
Cysteine CYS (C)103.52%
Glutamic Acid GLU (E)10.35%
Aspartic Acid ASP (D)155.28%
Glycine GLY (G)3110.92%
Phynylalanine PHE (F)103.52%
Isoleucine ILE (I)103.52%
Histidine HIS (H)51.76%
Lysine LYS (K)62.11%
Methionine MET (M)41.41%
Leucine LEU (L)207.04%
Asparagine ASN (N)155.28%
Glutamine GLN (Q)144.93%
Proline PRO (P)207.04%
Serine SER (S)227.75%
Arginine ARG (R)72.46%
Threonine THR (T)217.39%
Tryptophan TRP (W)113.87%
Valine VAL (V)217.39%
Tyrosine TYR (Y)144.93%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1368
HydrogenH2033
NitrogenN361
OxygenO403
SulphurS14

FormulaC1368H2033N361O403S14
Total Number of Atoms:4179


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    81985
Absorption 0.1% (=1 g/l)    2.694,   assuming all pairs of CYS residues form cystines

Ext. coefficient    81360
Absorption 0.1% (=1 g/l)    2.673,   assuming all CYS residues are reduced
Aromaticity:0.123

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.02

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.28, 30.99, 18.31]

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:72.1479
Grand average of hydropathicity (GRAVY):-0.05