Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5284
Number of amino acids:625
Molecular Weight:68453.96 Da
Theoretical pI:5.56


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)8012.8%
Cysteine CYS (C)81.28%
Glutamic Acid GLU (E)274.32%
Aspartic Acid ASP (D)406.4%
Glycine GLY (G)518.16%
Phynylalanine PHE (F)264.16%
Isoleucine ILE (I)132.08%
Histidine HIS (H)152.4%
Lysine LYS (K)325.12%
Methionine MET (M)172.72%
Leucine LEU (L)538.48%
Asparagine ASN (N)274.32%
Glutamine GLN (Q)203.2%
Proline PRO (P)274.32%
Serine SER (S)426.72%
Arginine ARG (R)213.36%
Threonine THR (T)355.6%
Tryptophan TRP (W)121.92%
Valine VAL (V)416.56%
Tyrosine TYR (Y)386.08%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3072
HydrogenH4635
NitrogenN809
OxygenO922
SulphurS25

FormulaC3072H4635N809O922S25
Total Number of Atoms:9463


Total number of positively charged residues (ARG + LYS):53
Total number of negatively charged residues (ASP + GLU):67
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    123120
Absorption 0.1% (=1 g/l)    1.799,   assuming all pairs of CYS residues form cystines

Ext. coefficient    122620
Absorption 0.1% (=1 g/l)    1.791,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.82

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.28, 23.52, 28.32]

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:73.008
Grand average of hydropathicity (GRAVY):-0.23