Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4825
Number of amino acids:516
Molecular Weight:57301.24 Da
Theoretical pI:9.1


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)499.5%
Cysteine CYS (C)81.55%
Glutamic Acid GLU (E)122.33%
Aspartic Acid ASP (D)285.43%
Glycine GLY (G)387.36%
Phynylalanine PHE (F)295.62%
Isoleucine ILE (I)224.26%
Histidine HIS (H)183.49%
Lysine LYS (K)305.81%
Methionine MET (M)112.13%
Leucine LEU (L)479.11%
Asparagine ASN (N)214.07%
Glutamine GLN (Q)183.49%
Proline PRO (P)244.65%
Serine SER (S)479.11%
Arginine ARG (R)224.26%
Threonine THR (T)275.23%
Tryptophan TRP (W)71.36%
Valine VAL (V)295.62%
Tyrosine TYR (Y)295.62%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2595
HydrogenH3948
NitrogenN694
OxygenO739
SulphurS19

FormulaC2595H3948N694O739S19
Total Number of Atoms:7995


Total number of positively charged residues (ARG + LYS):52
Total number of negatively charged residues (ASP + GLU):40
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    82210
Absorption 0.1% (=1 g/l)    1.435,   assuming all pairs of CYS residues form cystines

Ext. coefficient    81710
Absorption 0.1% (=1 g/l)    1.426,   assuming all CYS residues are reduced
Aromaticity:0.126

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.94

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.59, 25.19, 23.06]

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:77.9458
Grand average of hydropathicity (GRAVY):-0.18