Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4088
Number of amino acids:326
Molecular Weight:33636.17 Da
Theoretical pI:4.63


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)5115.64%
Cysteine CYS (C)185.52%
Glutamic Acid GLU (E)72.15%
Aspartic Acid ASP (D)216.44%
Glycine GLY (G)4413.5%
Phynylalanine PHE (F)154.6%
Isoleucine ILE (I)82.45%
Histidine HIS (H)51.53%
Lysine LYS (K)61.84%
Methionine MET (M)41.23%
Leucine LEU (L)144.29%
Asparagine ASN (N)103.07%
Glutamine GLN (Q)164.91%
Proline PRO (P)195.83%
Serine SER (S)257.67%
Arginine ARG (R)103.07%
Threonine THR (T)154.6%
Tryptophan TRP (W)72.15%
Valine VAL (V)164.91%
Tyrosine TYR (Y)154.6%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1469
HydrogenH2173
NitrogenN405
OxygenO464
SulphurS22

FormulaC1469H2173N405O464S22
Total Number of Atoms:4533


Total number of positively charged residues (ARG + LYS):16
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    61975
Absorption 0.1% (=1 g/l)    1.843,   assuming all pairs of CYS residues form cystines

Ext. coefficient    60850
Absorption 0.1% (=1 g/l)    1.809,   assuming all CYS residues are reduced
Aromaticity:0.113

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.53

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.01, 30.06, 23.31]

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:56.1964
Grand average of hydropathicity (GRAVY):-0.11