Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5738
Number of amino acids:154
Molecular Weight:16868.48 Da
Theoretical pI:6.91


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)63.9%
Cysteine CYS (C)1610.39%
Glutamic Acid GLU (E)106.49%
Aspartic Acid ASP (D)53.25%
Glycine GLY (G)1610.39%
Phynylalanine PHE (F)74.55%
Isoleucine ILE (I)95.84%
Histidine HIS (H)31.95%
Lysine LYS (K)127.79%
Methionine MET (M)31.95%
Leucine LEU (L)95.84%
Asparagine ASN (N)106.49%
Glutamine GLN (Q)00%
Proline PRO (P)95.84%
Serine SER (S)106.49%
Arginine ARG (R)31.95%
Threonine THR (T)63.9%
Tryptophan TRP (W)00%
Valine VAL (V)106.49%
Tyrosine TYR (Y)106.49%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC741
HydrogenH1139
NitrogenN191
OxygenO221
SulphurS19

FormulaC741H1139N191O221S19
Total Number of Atoms:2311


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):15
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    15900
Absorption 0.1% (=1 g/l)    0.943,   assuming all pairs of CYS residues form cystines

Ext. coefficient    14900
Absorption 0.1% (=1 g/l)    0.883,   assuming all CYS residues are reduced
Aromaticity:0.110

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.73

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.22, 29.22, 18.18]

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:68.3117
Grand average of hydropathicity (GRAVY):-0.07