Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4552
Number of amino acids:101
Molecular Weight:11049.03 Da
Theoretical pI:5.16


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1615.84%
Cysteine CYS (C)1110.89%
Glutamic Acid GLU (E)1211.88%
Aspartic Acid ASP (D)21.98%
Glycine GLY (G)32.97%
Phynylalanine PHE (F)43.96%
Isoleucine ILE (I)54.95%
Histidine HIS (H)10.99%
Lysine LYS (K)87.92%
Methionine MET (M)54.95%
Leucine LEU (L)76.93%
Asparagine ASN (N)21.98%
Glutamine GLN (Q)10.99%
Proline PRO (P)43.96%
Serine SER (S)21.98%
Arginine ARG (R)32.97%
Threonine THR (T)98.91%
Tryptophan TRP (W)10.99%
Valine VAL (V)43.96%
Tyrosine TYR (Y)10.99%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC475
HydrogenH768
NitrogenN124
OxygenO145
SulphurS16

FormulaC475H768N124O145S16
Total Number of Atoms:1528


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7615
Absorption 0.1% (=1 g/l)    0.689,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.633,   assuming all CYS residues are reduced
Aromaticity:0.059

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 50.94

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[21.78, 10.89, 39.60]

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:73.6634
Grand average of hydropathicity (GRAVY):0.18