Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4505
Number of amino acids:435
Molecular Weight:47381.38 Da
Theoretical pI:5.45


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)347.82%
Cysteine CYS (C)51.15%
Glutamic Acid GLU (E)306.9%
Aspartic Acid ASP (D)184.14%
Glycine GLY (G)327.36%
Phynylalanine PHE (F)235.29%
Isoleucine ILE (I)204.6%
Histidine HIS (H)153.45%
Lysine LYS (K)225.06%
Methionine MET (M)132.99%
Leucine LEU (L)5011.49%
Asparagine ASN (N)194.37%
Glutamine GLN (Q)163.68%
Proline PRO (P)235.29%
Serine SER (S)368.28%
Arginine ARG (R)112.53%
Threonine THR (T)204.6%
Tryptophan TRP (W)20.46%
Valine VAL (V)388.74%
Tyrosine TYR (Y)81.84%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2126
HydrogenH3345
NitrogenN557
OxygenO631
SulphurS18

FormulaC2126H3345N557O631S18
Total Number of Atoms:6677


Total number of positively charged residues (ARG + LYS):33
Total number of negatively charged residues (ASP + GLU):48
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    23170
Absorption 0.1% (=1 g/l)    0.489,   assuming all pairs of CYS residues form cystines

Ext. coefficient    22920
Absorption 0.1% (=1 g/l)    0.484,   assuming all CYS residues are reduced
Aromaticity:0.076

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.85

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.41, 25.29, 29.20]

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:95.9082
Grand average of hydropathicity (GRAVY):0.06