Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5839
Number of amino acids:307
Molecular Weight:35396.93 Da
Theoretical pI:8.26


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)123.91%
Cysteine CYS (C)61.95%
Glutamic Acid GLU (E)51.63%
Aspartic Acid ASP (D)10.33%
Glycine GLY (G)72.28%
Phynylalanine PHE (F)103.26%
Isoleucine ILE (I)165.21%
Histidine HIS (H)41.3%
Lysine LYS (K)20.65%
Methionine MET (M)20.65%
Leucine LEU (L)258.14%
Asparagine ASN (N)61.95%
Glutamine GLN (Q)10534.2%
Proline PRO (P)4815.64%
Serine SER (S)165.21%
Arginine ARG (R)61.95%
Threonine THR (T)72.28%
Tryptophan TRP (W)10.33%
Valine VAL (V)165.21%
Tyrosine TYR (Y)123.91%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1579
HydrogenH2439
NitrogenN447
OxygenO466
SulphurS8

FormulaC1579H2439N447O466S8
Total Number of Atoms:4939


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):6
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    23755
Absorption 0.1% (=1 g/l)    0.671,   assuming all pairs of CYS residues form cystines

Ext. coefficient    23380
Absorption 0.1% (=1 g/l)    0.661,   assuming all CYS residues are reduced
Aromaticity:0.075

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 114.63

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.06, 25.08, 14.33]

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:71.1075
Grand average of hydropathicity (GRAVY):-0.87