Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5337
Number of amino acids:319
Molecular Weight:35150.76 Da
Theoretical pI:9.19


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)185.64%
Cysteine CYS (C)20.63%
Glutamic Acid GLU (E)175.33%
Aspartic Acid ASP (D)134.08%
Glycine GLY (G)278.46%
Phynylalanine PHE (F)103.13%
Isoleucine ILE (I)278.46%
Histidine HIS (H)30.94%
Lysine LYS (K)247.52%
Methionine MET (M)61.88%
Leucine LEU (L)319.72%
Asparagine ASN (N)206.27%
Glutamine GLN (Q)185.64%
Proline PRO (P)247.52%
Serine SER (S)154.7%
Arginine ARG (R)134.08%
Threonine THR (T)134.08%
Tryptophan TRP (W)00%
Valine VAL (V)268.15%
Tyrosine TYR (Y)123.76%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1584
HydrogenH2554
NitrogenN426
OxygenO458
SulphurS8

FormulaC1584H2554N426O458S8
Total Number of Atoms:5030


Total number of positively charged residues (ARG + LYS):37
Total number of negatively charged residues (ASP + GLU):30
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    18005
Absorption 0.1% (=1 g/l)    0.512,   assuming all pairs of CYS residues form cystines

Ext. coefficient    17880
Absorption 0.1% (=1 g/l)    0.509,   assuming all CYS residues are reduced
Aromaticity:0.069

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.41

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.23, 26.96, 22.57]

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:100.188
Grand average of hydropathicity (GRAVY):-0.19