Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4488
Number of amino acids:442
Molecular Weight:49773.6 Da
Theoretical pI:6.04


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)276.11%
Cysteine CYS (C)51.13%
Glutamic Acid GLU (E)214.75%
Aspartic Acid ASP (D)235.2%
Glycine GLY (G)337.47%
Phynylalanine PHE (F)224.98%
Isoleucine ILE (I)194.3%
Histidine HIS (H)71.58%
Lysine LYS (K)173.85%
Methionine MET (M)143.17%
Leucine LEU (L)449.95%
Asparagine ASN (N)276.11%
Glutamine GLN (Q)122.71%
Proline PRO (P)235.2%
Serine SER (S)409.05%
Arginine ARG (R)235.2%
Threonine THR (T)204.52%
Tryptophan TRP (W)102.26%
Valine VAL (V)327.24%
Tyrosine TYR (Y)235.2%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2247
HydrogenH3423
NitrogenN591
OxygenO653
SulphurS19

FormulaC2247H3423N591O653S19
Total Number of Atoms:6933


Total number of positively charged residues (ARG + LYS):40
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    89520
Absorption 0.1% (=1 g/l)    1.799,   assuming all pairs of CYS residues form cystines

Ext. coefficient    89270
Absorption 0.1% (=1 g/l)    1.794,   assuming all CYS residues are reduced
Aromaticity:0.124

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.11

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.94, 27.83, 23.98]

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:82.6923
Grand average of hydropathicity (GRAVY):-0.18