Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4366
Number of amino acids:485
Molecular Weight:54390.76 Da
Theoretical pI:5.46


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)336.8%
Cysteine CYS (C)102.06%
Glutamic Acid GLU (E)377.63%
Aspartic Acid ASP (D)183.71%
Glycine GLY (G)357.22%
Phynylalanine PHE (F)224.54%
Isoleucine ILE (I)234.74%
Histidine HIS (H)40.82%
Lysine LYS (K)193.92%
Methionine MET (M)81.65%
Leucine LEU (L)387.84%
Asparagine ASN (N)408.25%
Glutamine GLN (Q)5110.52%
Proline PRO (P)265.36%
Serine SER (S)326.6%
Arginine ARG (R)295.98%
Threonine THR (T)183.71%
Tryptophan TRP (W)40.82%
Valine VAL (V)275.57%
Tyrosine TYR (Y)112.27%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2363
HydrogenH3714
NitrogenN694
OxygenO748
SulphurS18

FormulaC2363H3714N694O748S18
Total Number of Atoms:7537


Total number of positively charged residues (ARG + LYS):48
Total number of negatively charged residues (ASP + GLU):55
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    39015
Absorption 0.1% (=1 g/l)    0.717,   assuming all pairs of CYS residues form cystines

Ext. coefficient    38390
Absorption 0.1% (=1 g/l)    0.706,   assuming all CYS residues are reduced
Aromaticity:0.076

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 60.41

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.77, 27.42, 23.92]

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:72
Grand average of hydropathicity (GRAVY):-0.66