Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4634
Number of amino acids:213
Molecular Weight:21866.97 Da
Theoretical pI:7.13


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3315.49%
Cysteine CYS (C)62.82%
Glutamic Acid GLU (E)31.41%
Aspartic Acid ASP (D)157.04%
Glycine GLY (G)167.51%
Phynylalanine PHE (F)73.29%
Isoleucine ILE (I)62.82%
Histidine HIS (H)52.35%
Lysine LYS (K)62.82%
Methionine MET (M)10.47%
Leucine LEU (L)2411.27%
Asparagine ASN (N)41.88%
Glutamine GLN (Q)73.29%
Proline PRO (P)157.04%
Serine SER (S)209.39%
Arginine ARG (R)125.63%
Threonine THR (T)115.16%
Tryptophan TRP (W)00%
Valine VAL (V)209.39%
Tyrosine TYR (Y)20.94%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC958
HydrogenH1554
NitrogenN276
OxygenO294
SulphurS7

FormulaC958H1554N276O294S7
Total Number of Atoms:3089


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    3355
Absorption 0.1% (=1 g/l)    0.153,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.136,   assuming all CYS residues are reduced
Aromaticity:0.042

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 55.59

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.70, 25.82, 28.64]

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:97.6526
Grand average of hydropathicity (GRAVY):0.22