Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5528
Number of amino acids:452
Molecular Weight:51521.47 Da
Theoretical pI:6.45


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)337.3%
Cysteine CYS (C)71.55%
Glutamic Acid GLU (E)265.75%
Aspartic Acid ASP (D)204.42%
Glycine GLY (G)337.3%
Phynylalanine PHE (F)265.75%
Isoleucine ILE (I)224.87%
Histidine HIS (H)153.32%
Lysine LYS (K)214.65%
Methionine MET (M)71.55%
Leucine LEU (L)429.29%
Asparagine ASN (N)183.98%
Glutamine GLN (Q)112.43%
Proline PRO (P)296.42%
Serine SER (S)378.19%
Arginine ARG (R)214.65%
Threonine THR (T)194.2%
Tryptophan TRP (W)143.1%
Valine VAL (V)235.09%
Tyrosine TYR (Y)286.19%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2371
HydrogenH3509
NitrogenN609
OxygenO658
SulphurS14

FormulaC2371H3509N609O658S14
Total Number of Atoms:7161


Total number of positively charged residues (ARG + LYS):42
Total number of negatively charged residues (ASP + GLU):46
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    119095
Absorption 0.1% (=1 g/l)    2.312,   assuming all pairs of CYS residues form cystines

Ext. coefficient    118720
Absorption 0.1% (=1 g/l)    2.304,   assuming all CYS residues are reduced
Aromaticity:0.150

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.99

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.29, 25.89, 23.89]

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:77.2788
Grand average of hydropathicity (GRAVY):-0.27