Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5679
Number of amino acids:320
Molecular Weight:35293.99 Da
Theoretical pI:9.09


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)195.94%
Cysteine CYS (C)20.63%
Glutamic Acid GLU (E)195.94%
Aspartic Acid ASP (D)134.06%
Glycine GLY (G)268.13%
Phynylalanine PHE (F)123.75%
Isoleucine ILE (I)3310.31%
Histidine HIS (H)10.31%
Lysine LYS (K)247.5%
Methionine MET (M)41.25%
Leucine LEU (L)278.44%
Asparagine ASN (N)175.31%
Glutamine GLN (Q)154.69%
Proline PRO (P)257.81%
Serine SER (S)175.31%
Arginine ARG (R)144.38%
Threonine THR (T)134.06%
Tryptophan TRP (W)10.31%
Valine VAL (V)268.13%
Tyrosine TYR (Y)123.75%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1604
HydrogenH2575
NitrogenN421
OxygenO459
SulphurS6

FormulaC1604H2575N421O459S6
Total Number of Atoms:5065


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):32
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    23505
Absorption 0.1% (=1 g/l)    0.666,   assuming all pairs of CYS residues form cystines

Ext. coefficient    23380
Absorption 0.1% (=1 g/l)    0.662,   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 : 33.33

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.69, 26.56, 21.56]

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:102.625
Grand average of hydropathicity (GRAVY):-0.10