Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4651
Number of amino acids:580
Molecular Weight:64761.26 Da
Theoretical pI:6.34


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)356.03%
Cysteine CYS (C)101.72%
Glutamic Acid GLU (E)295%
Aspartic Acid ASP (D)274.66%
Glycine GLY (G)427.24%
Phynylalanine PHE (F)284.83%
Isoleucine ILE (I)345.86%
Histidine HIS (H)254.31%
Lysine LYS (K)183.1%
Methionine MET (M)172.93%
Leucine LEU (L)447.59%
Asparagine ASN (N)335.69%
Glutamine GLN (Q)101.72%
Proline PRO (P)508.62%
Serine SER (S)223.79%
Arginine ARG (R)305.17%
Threonine THR (T)467.93%
Tryptophan TRP (W)81.38%
Valine VAL (V)528.97%
Tyrosine TYR (Y)203.45%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2925
HydrogenH4493
NitrogenN789
OxygenO824
SulphurS27

FormulaC2925H4493N789O824S27
Total Number of Atoms:9058


Total number of positively charged residues (ARG + LYS):48
Total number of negatively charged residues (ASP + GLU):56
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    74425
Absorption 0.1% (=1 g/l)    1.149,   assuming all pairs of CYS residues form cystines

Ext. coefficient    73800
Absorption 0.1% (=1 g/l)    1.140,   assuming all CYS residues are reduced
Aromaticity:0.097

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.97

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.07, 25.34, 21.55]

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:84.4828
Grand average of hydropathicity (GRAVY):-0.13