Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4182
Number of amino acids:501
Molecular Weight:54540.89 Da
Theoretical pI:8.07


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)5811.58%
Cysteine CYS (C)81.6%
Glutamic Acid GLU (E)173.39%
Aspartic Acid ASP (D)275.39%
Glycine GLY (G)418.18%
Phynylalanine PHE (F)224.39%
Isoleucine ILE (I)173.39%
Histidine HIS (H)102%
Lysine LYS (K)234.59%
Methionine MET (M)122.4%
Leucine LEU (L)469.18%
Asparagine ASN (N)244.79%
Glutamine GLN (Q)214.19%
Proline PRO (P)336.59%
Serine SER (S)346.79%
Arginine ARG (R)234.59%
Threonine THR (T)305.99%
Tryptophan TRP (W)91.8%
Valine VAL (V)275.39%
Tyrosine TYR (Y)193.79%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2438
HydrogenH3757
NitrogenN667
OxygenO718
SulphurS20

FormulaC2438H3757N667O718S20
Total Number of Atoms:7600


Total number of positively charged residues (ARG + LYS):46
Total number of negatively charged residues (ASP + GLU):44
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    78310
Absorption 0.1% (=1 g/l)    1.436,   assuming all pairs of CYS residues form cystines

Ext. coefficient    77810
Absorption 0.1% (=1 g/l)    1.427,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.05

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.94, 26.35, 26.55]

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:76.2475
Grand average of hydropathicity (GRAVY):-0.23