Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4425
Number of amino acids:516
Molecular Weight:55110.55 Da
Theoretical pI:5.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)6412.4%
Cysteine CYS (C)81.55%
Glutamic Acid GLU (E)193.68%
Aspartic Acid ASP (D)316.01%
Glycine GLY (G)5210.08%
Phynylalanine PHE (F)234.46%
Isoleucine ILE (I)132.52%
Histidine HIS (H)61.16%
Lysine LYS (K)173.29%
Methionine MET (M)112.13%
Leucine LEU (L)468.91%
Asparagine ASN (N)254.84%
Glutamine GLN (Q)173.29%
Proline PRO (P)214.07%
Serine SER (S)499.5%
Arginine ARG (R)265.04%
Threonine THR (T)316.01%
Tryptophan TRP (W)81.55%
Valine VAL (V)285.43%
Tyrosine TYR (Y)214.07%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2427
HydrogenH3735
NitrogenN673
OxygenO760
SulphurS19

FormulaC2427H3735N673O760S19
Total Number of Atoms:7614


Total number of positively charged residues (ARG + LYS):43
Total number of negatively charged residues (ASP + GLU):50
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    75790
Absorption 0.1% (=1 g/l)    1.375,   assuming all pairs of CYS residues form cystines

Ext. coefficient    75290
Absorption 0.1% (=1 g/l)    1.366,   assuming all CYS residues are reduced
Aromaticity:0.101

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.30

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.94, 28.49, 27.13]

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:72.7326
Grand average of hydropathicity (GRAVY):-0.20