Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4987
Number of amino acids:425
Molecular Weight:45357.81 Da
Theoretical pI:7.17


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)317.29%
Cysteine CYS (C)61.41%
Glutamic Acid GLU (E)122.82%
Aspartic Acid ASP (D)174%
Glycine GLY (G)409.41%
Phynylalanine PHE (F)245.65%
Isoleucine ILE (I)235.41%
Histidine HIS (H)71.65%
Lysine LYS (K)204.71%
Methionine MET (M)102.35%
Leucine LEU (L)429.88%
Asparagine ASN (N)266.12%
Glutamine GLN (Q)143.29%
Proline PRO (P)296.82%
Serine SER (S)4610.82%
Arginine ARG (R)92.12%
Threonine THR (T)225.18%
Tryptophan TRP (W)20.47%
Valine VAL (V)307.06%
Tyrosine TYR (Y)153.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2043
HydrogenH3174
NitrogenN528
OxygenO607
SulphurS16

FormulaC2043H3174N528O607S16
Total Number of Atoms:6368


Total number of positively charged residues (ARG + LYS):29
Total number of negatively charged residues (ASP + GLU):29
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    33725
Absorption 0.1% (=1 g/l)    0.744,   assuming all pairs of CYS residues form cystines

Ext. coefficient    33350
Absorption 0.1% (=1 g/l)    0.735,   assuming all CYS residues are reduced
Aromaticity:0.096

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.64

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.00, 33.18, 22.35]

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:87.4117
Grand average of hydropathicity (GRAVY):0.07